Malicious PDF — malware analysis report

Static analysis result for SHA-256 9203d02996342c43…

MALICIOUS

PDF

84.7 KB Created: 2021-06-25 13:16:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2c1f26c8ca70a131200b699fd9d7d73f SHA-1: 2457ab8975930235a4a80947b6b7a19c9af3b6be SHA-256: 9203d02996342c43c2ee80fe7bb0ccb562ba6b6fc1650e8fb4d81b3107c6572f
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The presence of urgency language in the document body further supports a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.moyekolodin.com/files/xamitabatubofulaza.pdf
    • http://wecans.net/_UploadFile/Images/file/kasuponalupix.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160841c2b79ce8---zifikabo.pdf
    • https://clove7.com/userfiles/file/vegafolosugim.pdf
    • https://maplesservice.com/wp-content/plugins/super-forms/uploads/php/files/149a3195e584e8aa8451a1597382bb98/nubosoniriredufuwurarene.pdf
    • https://myphi.biz/nbloom/fckuploads/file/xofopijafosezivegufix.pdf
    • http://ya-ke.cn/admin/upload/14475765247.pdf
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160b1cb46a87c3---pibevisabek.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/bmju47eb06b5974isseaitcal2/xinifejimafufajogoj.pdf
    • http://mikailang.net/userfiles/file/20210525193357_852369155.pdf
    • http://guowangcable.com/d/files/62837579055.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/d6869259e23a8aa17ca0347757f1ace0/91228634215.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/0k578qcu8uju3ki3fkuqhpv5aq/99606468912.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608499e0654fc---kobage.pdf
    • http://abogarestudio.com/userfiles/file/gegavod.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=deprivation+of+character+meaning
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e76e.bin
7fdee388cf8556959f2150aa40d7db8679dfb073281276eca4a837be6e01fed8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE76E 10780 bytes
font_01_sfnt_off00010015.bin
06986f3ee8e042b60cd8389eb51ac38e73a370fa33225513005ae8fc6918066f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10015 17636 bytes
font_02_sfnt_off00012e27.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E27 16792 bytes