Malicious PDF — malware analysis report

Static analysis result for SHA-256 885e9b56a2f5b776…

MALICIOUS

PDF

76.3 KB Created: 2021-06-19 19:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 03512e97a7a9b6d43e26baa4f81e7da3 SHA-1: 4f59d3b8e76518b1f540c6182ea57e864a492719 SHA-256: 885e9b56a2f5b7768a01877fd69489b19c11c30d44bc41815cc1b00c366a1df1
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised websites and disposable hosting domains. The primary goal appears to be directing users to potentially malicious content or phishing sites.

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://wastran.ru/uplcv?utm_term=hd+streamz+new+apk PDF link annotation
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/185081b7bf322ab829b5fb50edd3ffc6/gekajorerarudivevok.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/eiat2jdges8bq8a7fckc6bfbv3/50334546969.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/xesonotumevatalobopotep.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/fuvogerebamazewidapilera.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/bujikitifusutanas.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c6ab16f22---51088654457.pdfIn PDF document text
    • http://coffee33.ru/archive/file/neriliri.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/5doolhgjt795a61ef449ho3l3m/95961824802.pdfIn PDF document text
    • http://cec-intl.ru/app/webroot/files/file/zeguriwagasosididavoz.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f58f6d41ea---xinogaf.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd91b938ea---nugura.pdfIn PDF document text
    • http://citywideok.com/clients/75789/File/xeputureremajuxunizajig.pdfIn PDF document text
    • http://faxik.ru/ckfinder/userfiles/files/tavumogotiranijobusuxe.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/4d8ae6e951481a785d948f362c9f105c/45253250707.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/cb26fc6a09fe1b94db4225ecb1807fea/zozipoteno.pdfIn PDF document text
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/kcca9ovu575qpdlsl9c370fmkl/nidelaj.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/p3kk14vadvtvoht4unfot5r5tl/gupakaxobidudu.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://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/681ae77bec1c6e3729d21cb11276b221/biwugujomevo.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE06 4868 bytes
SHA-256: d2264f75b470cb53e557fe8ea47aa3de5d477c633e84a813b60dd6e4b44994eb
font_01_sfnt_off0000ee82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE82 12124 bytes
SHA-256: 721d90c4e4cdbd84cb8552addeae432481e17c93a9f178a5d45fd81c4701f8d9
font_02_sfnt_off00011605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11605 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f