Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f1bcf0fd23a92b…

MALICIOUS

PDF

87.5 KB Created: 2021-07-14 01:20:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 690b03ff71dff1018fd4c44dba2c9e06 SHA-1: 7a8a04c0ff85ea04846a58abf38fd9d11b3113b0 SHA-256: 02f1bcf0fd23a92b5c6d882ff9311a5bcee988e5d59c34bd7cd99086b502bc2f
164 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a link farm. It contains numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute further malicious content or phish users. The document body was unreadable, but the heuristics strongly indicate a malicious link distribution pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://architects-desk.com/uploadsfile/93158200692.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee5a22f5a6---88174862097.pdf
    • http://uamarkets.com/images/file/motomorobefiramibawaxir.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9695bcad8---lolibi.pdf
    • http://stonestudio.pl/files/upload/file/13040864091.pdf
    • http://www.groupementpecheduloir.com/ckfinder/userfiles/files/zimaruv.pdf
    • http://szyuangang.com/UserFiles/file///86577707029.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a72115bb22a---gexadoginubo.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/c0bcfd4206d863eae52f2f87c5e022ec/semixurulizevusavi.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d12260bc50---77709219690.pdf
    • http://hitecds.com/userfiles/file/gejoto.pdf
    • http://agrobud.net/uploaded/file/69240665446.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1780a10bb---wedumewaxapa.pdf
    • http://jnnycc.org/userfiles/file/96059329975.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160745fbfb424e---fumukepip.pdf
    • http://fvv-hohenfelde.de/sites/default/files/files/dekerakanefa.pdf
    • http://fipjp.com/userfiles/file/11936500347.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160e3530d87512---jarupafupojibivefupo.pdf
    • https://alakharia.com/public_html/userfiles/file/zuxugotinigofapasaj.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd28b75952---pewekuniso.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1d431db06---rutesafazebevozofupuvo.pdf
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160919e80dcd1a---buvuretoxemabenimulonu.pdf
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/7fbad07c9a173fdcf6828910147876bc/27786802735.pdf
    • http://mobilesamara.com/img/files/file/75141706222.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=pacific+signifier+blue+eye+rainbowfish
    • 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_off0000f0e8.bin
6c6f831953c188c0ba892b00a1568540390e5561e8d2748bed70ff8520d9deeb
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E8 17608 bytes
font_01_sfnt_off00011ef5.bin
6ac761a558c1c0a484913bdeee8953e8014bbfe944efc0ef2a666bb833f8d3cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF5 10956 bytes
font_02_sfnt_off00013864.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13864 16792 bytes