Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b93c4c6236b5b0f…

MALICIOUS

PDF

98.6 KB Created: 2021-06-27 02:17:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 196f3eca42a858f71a8bf9de838c6f9c SHA-1: 5a237ac6d7a195e0d6a89e1e944bfcaea7160ff0 SHA-256: 7b93c4c6236b5b0f820a442fb6e6bea540a8be672feb4b2657e6952bd0dc5417
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566 Phishing

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. The heuristics reveal it impersonates Amazon and directs users to a non-Amazon host, likely to steal credentials. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users into a phishing trap.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=the+mafia+manager+pdf+free+download.
  • 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://nuestratierrapremios.com/campannas/file/zerukunovufamenezatenid.pdf In PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/4oqmr8jbk0hmor5tctfcnn11v1/14310093490.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608517bd899a1---kofakekuwipanorujigi.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/40820194220.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/6276d1afed41fa3a90e87487ec274427/gakelixi.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae890b0cad7---55627141725.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160905ce5b90a4---65410149459.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c11bcdc6f96---61241485473.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/b925c901a7637edfb91c55c6e1ee7980/pesewu.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607e429f120c2---tabatapuzurexi.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071a0554a1b2---87829518035.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ab0f73a4c43---sazenopifigabijimet.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606ee55b52e8a---7799365714.pdfIn PDF document text
    • http://krzysztofmalec.pl/gfx/fck/file/zunipubezadiberijakaxuf.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/6u1dsub9kutml79v9e5eosq8q6/7585069567.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210604014823.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/d4k581hv6c3anskco31htsnrg5/foxitatenijagu.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b8c14b861---80837292088.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/pf5al1h8b7v3e7t6k0c97qgumo/70423857397.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/d681b5391c7cae6ec99e02beb55b8fda/torejojipidurerugagono.pdfIn PDF document text
    • https://evpersoneli.net/ev-personeli/file/lemimojagenuda.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/m7u1qlpdjv56hf9b550jdve0m4/sobikiwe.pdfIn PDF document text
    • http://gingerbreadvillage.org/clients/e/e3/e396b250b60561adcb946853f9f62e29/File/xarorukoje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=the+mafia+manager+pdf+free+downloadPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/c8c387d51701d782d9a8ffed2f44ee7d/vuvujuvosudelosurexod.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_off00011d37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D37 17984 bytes
SHA-256: aa33c8fda25e5da3dd5ed8027c525134809cd42659fe7b2ce4484f122098e48c
font_01_sfnt_off00014ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000164fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164FB 10728 bytes
SHA-256: f1bdccb9b517c088885bc689211f6d697504a85aa78ee05a17506081f5c12e92