Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e104bd0fd5039c6…

MALICIOUS

PDF

98.0 KB Created: 2021-08-13 09:44:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 915e5b8cfa3a95d7f86b105567ee7398 SHA-1: ffc316a0c237c383b7a225f70750ca48535ec192 SHA-256: 2e104bd0fd5039c630a7e8224ef97aea3d9bac57ac7e9171c7dd432b34c8817e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is detected as malicious by ClamAV and an ML classifier. A critical heuristic indicates a lure to copy/paste content into a command-line context, suggesting an attempt to trick the user into executing a secondary payload. Numerous URLs hosted on compromised WordPress sites and disposable domains were extracted, likely serving as download locations for this payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://coretry.ru/uplcv?utm_term=windows+7+sp1+arabic+language+pack+32+bit+offline PDF link annotation
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e360a9269d3---68618272540.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/98cfdc42f490bdf30ac9daf202609e3a/23512975478.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160892b606c00b---98897537326.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/61552d2cf3427eef82080da7cac0de89/64298466082.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088ebe595114---xudaveroxow.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6f329d953---famelisizawosanaradulito.pdfIn PDF document text
    • https://senhewood.com/d/files/guxesalo.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ade0eceb473---ruxegu.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b491168a8a---76225462482.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/c8592679fe077caccfd098b343aa95b1/losaxikuxeri.pdfIn PDF document text
    • http://randalljroutson.com/clients/44711/File/78072451642.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/tuzapoxedekevu.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/92810e1d1a61a89fb32b0e330aabf898/31757299687.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/22f8a6fcd5b72962826cc6cf092f4e4e/fuxojetipalevugeginife.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/2de9df433077b267a132eb79032d5459/bokofujeginawevasosinorek.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/4a4813e7c6870c455b7123a3119fa6c0/4850397788.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609933484bff7---50583504172.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610bb7a1136d8---rojebonewu.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9d2e3ce13---fabawasariwave.pdfIn PDF document text
    • http://envigest.cz/upload/file/mixuteduremamofededowali.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/54b1799fa8e840bd88898037393cc53f/41900915350.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b81de7b00---kefarubanuzaf.pdfIn PDF document text
    • https://abeess.com/userfiles/file/34625522252.pdfIn PDF document text
    • http://miroslaws.com/ckfinder/userfiles/files/padavikidafuwunazewilowu.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/5b8013323613156069b9f5e3dc7db7c1/89559880563.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B6 18180 bytes
SHA-256: f346af2d374978df7c21bd0c82ee5e2ee50a23fdd3499fdc224377ab626c2684
font_01_sfnt_off000113ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C01 11600 bytes
SHA-256: f0b6b39310af2e9bd499848f84187a299fb3a08a3997b1b43058d8bed8099c29
font_03_sfnt_off00014782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14782 18028 bytes
SHA-256: 7279dfd8c34cc7620b473bd1b8aae76cc54b11acf22f4a3bc00a0e617d0b2cdf

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