Malicious PDF — malware analysis report

Static analysis result for SHA-256 8049ab3aa2aa804e…

MALICIOUS

PDF

84.6 KB Created: 2021-09-05 17:12:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 911664d5e8562b6cfa7af3b493590574 SHA-1: d6611a63cef03d0cce4b49c95ea9c43592ca7db9 SHA-256: 8049ab3aa2aa804ed851c508f2f62a4e121cb86829d3cc05dfb9d501e01f71e2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to various domains, some of which are hosted on compromised CMS platforms. The primary purpose appears to be directing users to external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://philabc.ru/uplcv?utm_term=fairytale+of+new+york+sheet+music+pdf+free PDF link annotation
    • http://malagi.pl/user-files/fck/file/91124375580.pdfIn PDF document text
    • http://hsi-international.com/ckfinder/userfiles/files/dibenewab.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/30237685793.pdfIn PDF document text
    • https://bataretak.com/img/files/file/zilazip.pdfIn PDF document text
    • http://apcmagon.com/userfiles/55375271928.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f9933da6ee4---70101787633.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608226f52d169---madudekujidozadojafagove.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/cb055fa1326d3fe74dd6002c7a7c8d2f/nezilen.pdfIn PDF document text
    • https://www.colline-eternelle.com/ckfinder/userfiles/files/43318350970.pdfIn PDF document text
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/79352eb03fe0fd309edfd2c8575f592a/losodepurotajigu.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/surozukavalazu.pdfIn PDF document text
    • http://slp61.com/clients/e/e2/e296dcecfd7d10ffef0cc83fef253c72/File/susijona.pdfIn PDF document text
    • http://sosonomo.com/ckfinder/userfiles/files/rubamobowu.pdfIn PDF document text
    • http://showplus.ae/userfiles/files/56660918622.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/62000484461.pdfIn PDF document text
    • https://sentinels.ro/userfiles/file/volujuwipelome.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/0fc14c5e9e3a4e5764ea3742fc055011/pasezosemevonidaluvawif.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/78835099466.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/64d6c303cbf28a03a8f04a7ef93c76a9/94599776585.pdfIn PDF document text
    • http://mamam.by/upload/File/file/jasusopozipat.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612b7fcc08ce5---94794442787.pdfIn PDF document text
    • https://oazapiekna.com/zdjecia/fck/file/putizovakejavewe.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/7925ca276fa67fa4051b47d1cda04abc/jevarupaxonoxuko.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/bosarufinem.pdfIn PDF document text
    • http://smflow.in/admin/uploads/file/62310826387.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_off0000e212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE212 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA29 11256 bytes
SHA-256: 9342b5ee0e1a7ba21bea594f17e89504fda2b23388e5850be7cf106c8304baeb
font_02_sfnt_off00011470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11470 18304 bytes
SHA-256: 0669d1d818ab92bc4ed585cbb5164aa345e72991c0d679db4ceaf8610a431ea1

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