Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f70490e9be45955…

MALICIOUS

PDF

78.4 KB Created: 2021-06-13 11:33:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 36d088592d5d6ecf1ebbbe2666f15a93 SHA-1: b7513be39acca6830a8d011c85d5449e89a36324 SHA-256: 6f70490e9be45955d63b39cf8c53cf4376f126e16c5aebf7f80e751c2f8a9c86
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the overall detection profile indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://garglob.ru/uplcv?utm_term=get+iq+score PDF link annotation
    • http://kimyasaldubeller.com/upload/ckfinder/files/10022553406.pdfIn PDF document text
    • http://yuha.be/_files/file/13047513058.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf9248acbf---27157408597.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae1d0b2459---79123744213.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609af39aeb423---lebogomuzetodobagexibalid.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-4-29/20210429180034847175.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a88a14e4391---dokosijeluwulevisagim.pdfIn PDF document text
    • https://lentes123.com/aym_image/files/4435352368.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/dedojadumowomodaked.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/f431c87b9a3f015aaafe7655978e085f/tixomalolidebufuponow.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/43779319ada2276f68ed56d0c80eb526/karupupoziluvanafo.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa23a21828b---dodofazimugo.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/gasodenomotukamujakigu.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/godakubefaj.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/susj7582bm0535048lice065k2/39628332145.pdfIn PDF document text
    • http://randalljroutson.com/clients/44711/File/2098081506.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/8c4c30c45ee229b1a86646777335dd6a/gosuli.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834367b8f38---jenuvim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECED 4388 bytes
SHA-256: 6b87b7543f3fec09cdd3675ea0882e9f942075680f0610631cfa2dfbcff5b149
font_01_sfnt_off0000fbee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEE 10200 bytes
SHA-256: f347eb63afdcf8e197eefd5f61fe40baa7a0ef5cdb10e2f9c58019f1e1fd2e81
font_02_sfnt_off00011eb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB7 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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