Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ff229f76c0f822…

MALICIOUS

PDF

70.5 KB Created: 2021-06-06 05:14:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 827a309a406616fabd8f228aa297d1ad SHA-1: 606972aa825d84bfd2eeb7155b443c32fc0a6002 SHA-256: d7ff229f76c0f822e1860b65822fd6812c28d1b6a7fac9585c69ec35a5b0e1ac
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites, suggesting it's designed to exploit vulnerabilities or redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript points to its use in exploiting PDF reader vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wastran.ru/uplcv?utm_term=clash+of+clans+money+glitch+2019 PDF link annotation
    • https://dialogueinpraxis.net/files/docs/poparofovadagoloxuweliza.pdfIn PDF document text
    • http://fygl.net/uploads/file/13092939884.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/d4evuucrt8083jsrqbvjctqps4/noxepoxizixaxuw.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac55c9d167f---31350485721.pdfIn PDF document text
    • http://thuephotocopytaihanoi.com/upload/files/92687116320.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608137e0902e0---bifanupikejevumokebemori.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/wegibajiz.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16074bb38be1ad---dosekanezosagafomopobi.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/c8l6flg1pr3v3kvq990lpo95n2/50182079833.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//98984918546.pdfIn PDF document text
    • http://learningkey.org/userfiles/tujatotusifexi.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/28294828713.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/54eb6f8e7793d13c3bc3d94daf07ca29/lamofuxiwir.pdfIn PDF document text
    • http://beijinghuojia.cn/userfiles/file/70921968720.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/860025aad1d188d4ca31b73d4c8a4b54/lirefalewokigep.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/takazodotar.pdfIn PDF document text
    • http://grandrosso.com/js/upload/files/neragalefavubenizux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4EB 5688 bytes
SHA-256: 547c92cc61b69d0c0868dfdd5ae3f374eb0f022c6908e2ba2defcde0809b21f0
font_01_sfnt_off0000e830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE830 11748 bytes
SHA-256: d15cb45ce9dd8ee33f85d70aed6bb75a2f3d1df18acfdb3c387bd815125901d4