Malicious PDF — malware analysis report

Static analysis result for SHA-256 27cf286c4b6c2d37…

MALICIOUS

PDF

119.4 KB Created: 2021-07-08 04:31:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ac47ce67ed85d893ee930e3f20cfac61 SHA-1: 86fc1bd07fb04c638470741f9d75cb2d7e11571d SHA-256: 27cf286c4b6c2d376947c1d9efe27597a61f179f4361cb9f54a4c5388390e2a6
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised CMS upload directories, indicating it's designed to host and distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9892

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://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4469c2975---vunuzegu.pdf In PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/goatkr4ghircnluem59r3ih4b6/ruxukop.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160941f137c1df---66302183250.pdfIn PDF document text
    • http://wu-pao.com/upfiles/editor/files/rajazetavowubejisojo.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/7cff03c7ba9092bb4af23faf91195ab5/39034507305.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/nufasirubeli.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16098447186aef---59275932471.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/lituwekoxik.pdfIn PDF document text
    • http://faradtvandor.hu/picture/userfiles/file/nirujudikibup.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a19159eeaa---pasipibazevadet.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa85b39ff6---58909830711.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf615b0387---rugikewonavax.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/ff49b5a055313b01f87c91f8d02494c0/99149251521.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/59f887f598eeb264d769a967dd1b4a53/fazapul.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9b3f9c961---50361005407.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/16acebdeb8ed87cabc5a1f5b0543de76/dawofujogoruravarutopo.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b54a631f783---8031577936.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/dcddcf087d544979b59074585fa53507/2865056253.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1607febca54cb7---80312524673.pdfIn PDF document text
    • http://jucal.es/images/file/mirazagimaz.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16071f18f88653---pulusevofirazileti.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/16087103b36721---vupelaw.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/982782f02bfa2d8a1ab4848b4b49d764/ralemoxilabojurebemax.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160acf7a0a06d4---ferodoromasepusog.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/609dhlmkv2vc1ea2kntlc1g4i0/jofotijuv.pdfIn PDF document text
    • http://itkaufmann.com/images/fckimages/file/gamewalizapaviladusib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=levitical+priesthood+in+the+biblePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000170db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170DB 17144 bytes
SHA-256: 2d788be8de6160bfd389ccff591385f994123a012c647a586415996cd1511d5d
font_01_sfnt_off00019daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001b5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B5C6 10776 bytes
SHA-256: 0c4dafa690ba5e3eb981b14deb8b1d9439f549b5908fddc306b53cd1e3eb8de3

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