Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e032f768e746aca…

MALICIOUS

PDF

86.9 KB Created: 2021-08-06 22:54:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9cf87c5cb89737369c9635c78f87de49 SHA-1: 856b8774b41aedd4a00b8e779898b32102eab593 SHA-256: 7e032f768e746aca926aafabb2da6fa40844270284aed0973672eb5827acc4a8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of a 'Clipboard command execution lure' heuristic suggests the document instructs users to copy and paste content into a shell, a common technique for executing malicious code. Numerous URLs pointing to compromised WordPress sites and disposable hosting were extracted, likely serving as download locations for secondary payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://infrive.ru/uplcv?utm_term=windows+8+bootable+iso+file+download PDF link annotation
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/0f81c93890c5a40fc85e68877a7e919d/niwisamuwavab.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610358b8ed227---busun.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/51305201885.pdfIn PDF document text
    • https://bouveau-consulting.com/userfiles/file/vujamumi.pdfIn PDF document text
    • https://thingstodobahrain.net/ckfinder/userfiles/files/83312594505.pdfIn PDF document text
    • https://royal-art.pl/uploads/userfiles/files/situvesaziruwugonor.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a44bee810a4---juluwe.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/gajoxurebudo.pdfIn PDF document text
    • http://www.me.ntou.edu.tw/ckfinder/userfiles/files/20210801_104123.pdfIn PDF document text
    • http://antonio-pelella.eu/userfiles/files/botedopokazemonopi.pdfIn PDF document text
    • https://gw21.ch/uploads/userfiles/file/pilinutasonibobevav.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d70a590bc---xonefexupofebagisuwuge.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/fatim.pdfIn PDF document text
    • http://vangphugia.com/userfiles/file/maxad.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/b747ed4778e1c3104c9870e450c19a7d/jikokixepugadokosoweju.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/89989293247.pdfIn PDF document text
    • http://attlas.center/userfiles/file/86539489310.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/e0bf4c951cd19235d764cd37eccc6835/xapukivebivipavagato.pdfIn PDF document text
    • http://caramelitos.sk/files/50005037317.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/6hknih6b98m93gnt2vljeu5394/4842861664.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e12ecd76f5a---megetubilo.pdfIn PDF document text
    • http://mistral-paints.cz/userfiles/files/49323263399.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/ei99g7qqv0brvoqasehkkljdq4/japasewuwi.pdfIn PDF document text
    • http://fzsvybbs.at/userfiles/file/87757085947.pdfIn PDF document text
    • http://millecolori.it/images/file/titedes.pdfIn PDF document text
    • http://vantaidongsaigon.com/uploads/files/96597646825.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_off0000efff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFF 16852 bytes
SHA-256: 9dc3c614696365494b0bd84b93056b5c9586f17757b6b3298b42b82b416909ac
font_01_sfnt_off00011bf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001340a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1340A 10676 bytes
SHA-256: 13805e42b19658fb66d5f14b287f9afc656c7765606fec67ba5d5a99fc90082c

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