Malicious PDF — malware analysis report

Static analysis result for SHA-256 63608d55dc9500d7…

MALICIOUS

PDF

84.0 KB Created: 2021-09-08 00:06:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c771c1309be7dac0287732ec879853c7 SHA-1: 9908135e4af69ce72deac21b81aae3b95d0f053a SHA-256: 63608d55dc9500d7261e5c37ce277c18eca1795c4d2140d956ba46a1acd694cd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan. The presence of numerous links pointing to compromised WordPress sites and disposable hosting, combined with a visual download button lure, indicates a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drafthe.ru/uplcv?utm_term=2008+honda+rancher+420+es+owners+manual PDF link annotation
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/f9840f8b58a22eaabfcc241238a5184a/jufigilozaxebamanop.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611902d67d4fa---sukawuxubu.pdfIn PDF document text
    • https://biocoils.com/img/file/berenomatuzogi.pdfIn PDF document text
    • https://adverto.ee/userfiles/file/46928684708.pdfIn PDF document text
    • https://turismopontevedra.com/ckfinder/userfiles/files/benep.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/fbe9e4a5497879a8b92c65d48167e637/65901323260.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5110e1569---vabudazerenokezozape.pdfIn PDF document text
    • http://nhadep30giay.com/uploads/image/files/gumes.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9abad3bcc1---816336389.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0688a721a---75504987211.pdfIn PDF document text
    • http://clean-ecology.com/Upload/files/ruvuva.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/55ccec8216a8d95d6fc0f87cc45591c8/47205797064.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/1335739002.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/6d811ba83407f5924430b0a6e4c0b2ef/rejekixesexiwapeke.pdfIn PDF document text
    • http://reckdance.pl/userfiles/file/63648677388.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160945b0b99c5e---1338159774.pdfIn PDF document text
    • https://thingstodobahrain.net/ckfinder/userfiles/files/vifuvejofumuwut.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa42a0bc7d---99566140988.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/kobis.pdfIn PDF document text
    • http://www.pro9apps.com/app/webroot/files/uploadimagesfile/83036648601.pdfIn PDF document text
    • http://tweedehandswikkelaar.nl/app/webroot/files/userfiles/files/kuvezexipem.pdfIn PDF document text
    • http://abwingssuffolk1.com/uploads/files/93295873797.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612368f8ecf4b---sodifexijisomadinim.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE048 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f85a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85A 18228 bytes
SHA-256: b029a1598d1258dbab07022a1c5e0da0d2c65891cfd6087b0415b012e3b39d29
font_02_sfnt_off0001285c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1285C 11060 bytes
SHA-256: 33de4e7ee97f860d5a46ba8b4c642ae1df9722ea99747be33e3a2bb8bb53586a

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