Malicious PDF — malware analysis report

Static analysis result for SHA-256 34b9ef7950384907…

MALICIOUS

PDF

77.7 KB Created: 2021-06-24 19:16:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a30f18351283d399e5b8cfd042d727cb SHA-1: 740a620934e828771baa6bf189b767e88e091ca3 SHA-256: 34b9ef79503849074d1d0686159d8e5711860089cdc6de1cd34103af9e4bfa2b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many hosted on compromised WordPress sites, that likely lead to further malicious content or exploits. The document body, though heavily obfuscated, suggests a lure related to 'Build cheats sims 4', indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074ba48867d7---93448126083.pdf In PDF document text
    • http://czdashan.cn/uploadfile/file/2021043001224573499.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/53429611218.pdfIn PDF document text
    • http://logisticsnetworks.net/ckfinder/userfiles/files/gafabaluwujulinomi.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/oh3j1ccl1g3nvcqbiijoslcnm1/pesinejuwezuximiw.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607184fbd80d0---favavizimemedovoxobopudis.pdfIn PDF document text
    • http://richwoods1969.com/clients/861079/File/talalubukizafavosatosate.pdfIn PDF document text
    • https://pui-vital.ro/msg_media/file/22424139938.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/42954387453.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/10245c40b3974e890959027e67779171/tudepugu.pdfIn PDF document text
    • http://vietsinphar.com/uploads/files/xuvedilalezedegujipapej.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/delijakuxef.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/woregijuvuputiru.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607a959e49d2e---zosusatakalaxan.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/k4eip6dmo2f045cu34d4u6n0r3/wifexigopupudalelaso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=build+cheats+sims+4PDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A0 5220 bytes
SHA-256: bbc168845a5a816951c3132611356c9ae46079408050bfefbdb55d0711b28168
font_01_sfnt_off00010442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10442 11240 bytes
SHA-256: 5b10609dabe6f89d4ce46e8bae44d7e0ed079ed7e29af2ef39a7a0336a4e7e3e

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