Malicious PDF — malware analysis report

Static analysis result for SHA-256 bafffdd212d5106f…

MALICIOUS

PDF

84.5 KB Created: 2021-07-26 23:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 066999a6fd7f5251d4714e82a830e9a6 SHA-1: d0a1cb83e0b72206367d1dc210672485bc537fce SHA-256: bafffdd212d5106f0781f90993bf0daf9719e715ddcd3204653b288f63ed48bf
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm hosted on compromised CMS uploads, pointing to numerous distinct domains. While no scripts were extracted, the structure and URL patterns suggest a phishing or redirection attempt, likely serving as a lure for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608210225e29b---5495324584.pdf In PDF document text
    • http://mea-travel.pl/userfiles/file/lajezosasujaboxiko.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/topekirimisejuzujanez.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/76475057941.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/9e77ab7a581a037be9b68e1e0c95b609/72939307788.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/53358052716.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/4d4babe5edb3773f48940ef08ff7a88b/pobevenixu.pdfIn PDF document text
    • https://digireg.pl/upload/kelegejurewewojezu.pdfIn PDF document text
    • http://ideatity.com/ckfinder/userfiles/files/91123158388.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/75977303357.pdfIn PDF document text
    • http://tischlerei-schlusche.de/sites/default/files/file/75848393544.pdfIn PDF document text
    • http://wasserentkalkung.at/ckfinder/userfiles/files/dopuxob.pdfIn PDF document text
    • http://nofatrans-int.com/userfiles/file/vadawomoteranikusatoz.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/214ca7fec568890262b2288832d94e5c/nefolex.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160784bd0c88ab---8496545916.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160866555600ad---wajelaboxaredeg.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/e0b2ef009a837d59d05f88fbe56596fc/badolufaguguka.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16094bdbd27ce7---forilorafanegi.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/8uud4tmr7av6op869deq32h9d2/rixonagenivaku.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/a4a1af35d0f78af717355f226c5b8f31/22230902172.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072189f1cc58---xoxevuvepegezuxenatiwujop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=what+are+the+10+branches+of+physical+sciencePDF 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://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_off0000e627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE627 11000 bytes
SHA-256: ee7bd27977b65195af0619b8b26a27ce57995970e6eeee2c17cd1740ec278fc7
font_01_sfnt_off0000ff7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7F 16936 bytes
SHA-256: 485d3575eceb7aaadd02d5a9492d3fe8327997fddf6d2cdfef93a41b3ee3e220
font_02_sfnt_off00012b88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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