Malicious PDF — malware analysis report

Static analysis result for SHA-256 9413c7d2803d0848…

MALICIOUS

PDF

85.9 KB Created: 2021-06-09 17:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7bce84a9189dbdba2b60cf56242a39ea SHA-1: 0a9773d3242f5c5f2f64f7d6777a57b83ec6a7d3 SHA-256: 9413c7d2803d0848cb977b09870f6fbdcfe00bf6bc843507f46cc7bb72479099
186 Risk Score

Malware Insights

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

The PDF file contains a lure related to 'Gta 5 afk money glitch solo' and embeds a large number of external links, many pointing to disposable hosting. This behavior is indicative of a link farm or phishing campaign designed to redirect users to potentially malicious websites. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://infrive.ru/pbw?utm_term=gta+5+afk+money+glitch+solo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377697/normal_602c3ca36af3a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462352/normal_5fff4d437e87a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406473/normal_5fc899365075c.pdfIn PDF document text
    • https://ferosikapomizud.weebly.com/uploads/1/3/4/5/134526037/71a90370e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392209/normal_5fd1faf31a05a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_602af54556629.pdfIn PDF document text
    • https://wevoforu.weebly.com/uploads/1/3/4/5/134591306/korefu_vovenupize.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369146/normal_5fd93950ddabd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475194/normal_601b01317df13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446263/normal_604b7e90abf03.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445573/normal_5fee5555f182c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480598/normal_6055bc67909e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414156/normal_60be941340ed4.pdfIn PDF document text
    • https://dakurawal.weebly.com/uploads/1/3/5/3/135321076/9922044.pdfIn PDF document text
    • https://govopejixaw.weebly.com/uploads/1/3/7/5/137514815/5760101.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391000/normal_602013f8e33d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470014/normal_603b1a3c7c7e7.pdfIn PDF document text
    • https://midoninojun.weebly.com/uploads/1/3/4/6/134665084/7337d87c0d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408702/normal_603fdaf77b60d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412593/normal_6013c2a6a60bb.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4488336/normal_60b07f963bf1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421354/normal_603bb69a6732d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gaxoxim.pbworks.com/w/file/fetch/144575202/33280780064.pdfIn PDF document text
    • http://jobagej.pbworks.com/w/file/fetch/144610680/77101663838.pdfIn PDF document text
    • http://wuwolufit.pbworks.com/f/kazajarifuxejeraro.pdfIn PDF document text
    • http://kekirow.pbworks.com/f/pexipokitef.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
    • 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_off0000f774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF774 5520 bytes
SHA-256: caec979f44c4ce4e94dbeaf707f6152cbbab6e60762632d73da82df11157f4fd
font_01_sfnt_off00010a35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A35 12668 bytes
SHA-256: 61d5feff67314dec8589774d8557be69b20ceb9900ce3ec33745a3b680f73996
font_02_sfnt_off000134da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134DA 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2