Malicious PDF — malware analysis report

Static analysis result for SHA-256 7412bc05ddb0b057…

MALICIOUS

PDF

86.7 KB Created: 2021-09-04 07:13:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 22be7e86f4f4217f0b0b012c00d1e7b3 SHA-1: 15a485e985700a3f170644e34454832d6173c228 SHA-256: 7412bc05ddb0b057d40b28cb2df2e2649c58e31d0dace361c1206348fc149774
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, directing users to multiple compromised websites hosting further malicious PDFs, likely as part of a phishing or scam campaign. The presence of invoice-related language suggests a lure to trick users into downloading the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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 http://soles2walk.cz/data/file/67007922144.pdf In PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1610e8cc5b148d---gaziwidisilawupimig.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1606f44726ee4f---6510184415.pdfIn PDF document text
    • http://statsale.com/data/upload/ck/files/dawuxuw.pdfIn PDF document text
    • http://dzwigipoznan.pl/userfiles/file/papubinonulorepaposuweran.pdfIn PDF document text
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/60300525419.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/12260d9f4985d2c479e87c947cd341b9/gubulukebog.pdfIn PDF document text
    • http://masterref.ru/editorfiles/file/zexalakukawebezegubip.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac35e935c6---28815800179.pdfIn PDF document text
    • http://nissanotogovap.com/uploads/images/files/32771648449.pdfIn PDF document text
    • https://campermagazine.tv/public/file/xusanavarumogu.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/g0s0odp94f3pshv0jvdk3t43n3/zumasasuri.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/51274278610cb0d5903ac009d8bc520a/guvasoxudoganepuxutapinom.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec4f1e47ad---powola.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083bcc58cd96---30172954931.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210901_619CF12E94A1748A.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16093d0f7d47b0---domusos.pdfIn PDF document text
    • https://pmms-online.com/assets/file/71558479786.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/49940423177.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/1fb2a6c9ee9c2d923bbb21a6ab1c87d1/dobobowewiguvujuvoxew.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/06491457f48767eec249b3d7a2a308a7/85601375714.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/b118f3f2d51db2a2330175f2db53600a/76991392625.pdfIn PDF document text
    • https://jesssmithtri.com/jesssmith/ckfinder/userfiles/files/81244137566.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=uml+diagrams+for+online+bookshop+pdfPDF link annotation
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103EB 11084 bytes
SHA-256: 8adcb2b1edef87ea78901993d881b793c15414028ff5ebedbcef844c35855c05
font_02_sfnt_off00011d06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D06 18516 bytes
SHA-256: fabcf61214674da91817cd66d3d0a7a035340e76a4c5f78faeb3e9859f6b9ee1

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