Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aa8512af953aa29…

MALICIOUS

PDF

88.4 KB Created: 2021-07-29 17:43:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cdd8d1b7cb380ee372eb593d438f959e SHA-1: 5b9dfa27aff52755a6868cf604d2a0efc1674950 SHA-256: 8aa8512af953aa29e716893a86713110368c7e2e87b8523f1f8490821165ad33
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to obscure the ultimate destination. The presence of a 'download button' lure and callback phishing indicators further support a malicious intent to trick the user into downloading a payload or engaging with a scam. No scripts were extracted, but the overall structure and heuristic firings indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://location-venise.com/italie_documents/files/6094358957.pdf In PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/feropiwajuzuzukodibomelu.pdfIn PDF document text
    • http://aps-mes.com/files/file/90355270156.pdfIn PDF document text
    • http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/3089317522.pdfIn PDF document text
    • https://superchills.com/userfiles/file/tepapeloxizup.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/31a4e3abcfce300ca043ac6563d0de6b/41036669987.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/xiwevuwa.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/f40d55b295f6dfdd2271468850dfe3ba/jabivusijanuxedagaros.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/62268940153.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c633ad5ac0e---serowebusewe.pdfIn PDF document text
    • http://3qbuy.com/CKEdit/upload/files/nazejezazakefile.pdfIn PDF document text
    • http://ordinate-ltd.com/file_media/file_image/file/vimesiforobutebir.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/zorojilozubazasepaw.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/ec6f7688c5cad690113a06ef961b252d/dudazanodonapofapikarusi.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/lipafugigasegokaw.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/4ce4181347e50a4a8a6410c85b02b72a/83255664364.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/fba7ae63ae2530bbe82cf26676576e07/turibem.pdfIn PDF document text
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/9a55f661ea8bef86774ce414fb37f0e0/rumakusovup.pdfIn PDF document text
    • http://fusen-es.info/yamituki-n/uploads/files/rodaregatubokuvuvexewuba.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c0cadeb4559ee4f56ebbecc0c1a3d1c2/17199506182.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/lipolipeza.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf6d4e8669---38462984599.pdfIn PDF document text
    • http://dwornawodzie.pl/userfiles/file/71194666736.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/d9f29449e36d6854ee97bc7e33f49616/xomowo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=bissell+cleanview+swivel+pet+plus+manualPDF 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_off0000f445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF445 10620 bytes
SHA-256: 42eed5fa259c858eab1639bfb7ce78f8089639055603dfe896ed3c7b57c1008a
font_01_sfnt_off00010ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000124b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B2 17680 bytes
SHA-256: 817d77466016eeaa2ad6237840d279ffdee59d4587c9222c87c4f03a2788fafa

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