Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ecf96e760ded2bc…

MALICIOUS

PDF

85.6 KB Created: 2021-07-03 15:30:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: df8e3f1e31f1443886f64472c0c38e80 SHA-1: 27857a0ec1a07df374c55757a2a9227c46c3eea8 SHA-256: 7ecf96e760ded2bc03340e927d164868de90dc112e9e1a2cebfaf199f2738374
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. Heuristics indicate this is a link farm, likely intended to direct users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly suggest malicious intent, with the document acting as a lure to external, potentially compromised, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/tkof2g7vfkiqben76fcm1e15f9/gomamape.pdf
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/3119c9609e050a51eeedda12b7d77c23/55081326674.pdf
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/vpr6h1k6paqvq7ehlfsodd6mh5/bikajivimuwufulof.pdf
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/b23dd1500c84dcc3b03ef0e7f859dfaf/21261403780.pdf
    • https://wfca-czech.cz/temp/userfiles/files/72270891600.pdf
    • http://lynxitservices.com/ckfinder/userfiles/files/xizugogopo.pdf
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c79691dc51---raxaxasedasiz.pdf
    • http://goodwill.as/userfiles/file/jaxukikemabin.pdf
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/geh78af6f0v0i7jbj5krn7tjv4/lewuziz.pdf
    • https://liantoong.com/archive/upload/files/81776127959.pdf
    • http://ridgefieldpark1967.com/clients/3/39/39eebdc8797e30ee23d4fd57d071fd44/File/pagilududolapu.pdf
    • https://kalitelivideoizle.com/resimler/files/18711785819.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/28e625f8f79b901d5c2607eb2b4f762b/29806040315.pdf
    • https://ahha.az/userfiles/file/75235648893.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ccad9a1e25e---fevadapejunoluzuvaxorun.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cfd6c1a075---10832089308.pdf
    • http://elitvorota.ru/f/file/rolororewu.pdf
    • http://wienbildarchiv.com/upload_files/files/61172251105.pdf
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/f6fe0b41ad9703107488bb5cfad0b255/68865439627.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f9919fe95f6977e018917c49ef809ef1/96896480597.pdf
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/98d4e35bea0207a1f27bbbb4bd27ccb7/39615552165.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16087a1aaa00f9---xajutirapu.pdf
    • https://vannordenvastgoed.nl/userfiles/file/92328343156.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16083ba385ebe5---kenonekisegifawa.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=english+word+with+three+consecutive+letters
    • 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_off0000ecae.bin
7fedb0719b189d79b7cf1a10a322ffaa48f58be968b01addb7eee9d0e2b8bcfe
pdf-font-stream PDF embedded font (sfnt) at offset 0xECAE 16852 bytes
font_01_sfnt_off0001184e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1184E 16792 bytes
font_02_sfnt_off00013065.bin
d52afd45cfdbc64cf6e36373cbac962ce54dc5c5542e0279d772d3216767f043
pdf-font-stream PDF embedded font (sfnt) at offset 0x13065 10724 bytes