Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e9339485646e692…

MALICIOUS

PDF

86.9 KB Created: 2021-05-25 14:04:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 80041adb64435487f8e7f1985e5cf512 SHA-1: 046d0abbf6147115c1d2e441777878cbc7de4f1a SHA-256: 1e9339485646e6922909a2c2e2ce30748f4c465135d159adca30fc7ad285e405
186 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to direct users to external websites, masquerading as a download for 'gta liberty city stories apk obb download lite'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs and the heuristic findings of a link farm on disposable hosting support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://zajinet.ru/strik?utm_term=gta+liberty+city+stories+apk+obb+download+lite PDF link annotation
    • https://binigikuvoloxog.weebly.com/uploads/1/3/5/3/135332024/e351cc67c4.pdfIn PDF document text
    • https://telixezudaridif.weebly.com/uploads/1/3/0/7/130775339/4143ff37.pdfIn PDF document text
    • https://lomizagufefeg.weebly.com/uploads/1/3/4/0/134096038/jofofim.pdfIn PDF document text
    • https://tigigedilopufam.weebly.com/uploads/1/3/5/4/135400960/1f6295609.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475379/normal_5ffd61a663ac1.pdfIn PDF document text
    • https://pezebojikunebal.weebly.com/uploads/1/3/4/3/134362674/lezugalopijo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495271/normal_6004bebcbde96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380705/normal_5fe8c7fd7eece.pdfIn PDF document text
    • https://razolonupul.weebly.com/uploads/1/3/4/8/134888498/kigixalosurizalunugu.pdfIn PDF document text
    • https://fenejetamop.weebly.com/uploads/1/3/4/6/134697978/genow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460983/normal_5fc8dec938609.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451208/normal_605f2d829b1a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417046/normal_6029a3a2ed3f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490523/normal_602cee03d9ffc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368481/normal_5fc94f5126f82.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499300/normal_5ff1807d2f7bc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b64577ea-6ee9-4f49-8c66-1050520a6aa3/50523608497.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/791f387e-1b0a-4d20-9fee-98e78b8981a8/stick_war_legacy_mod_menu_latest_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33ccb86f-4190-4190-ba25-b8ef3ffc5ef7/ati_nursing_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cea3b731-01a9-4d9a-a9c2-e28ac7979983/winutexatetosovetitu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83ce34a4-e3e1-42c1-87c4-18ec7d1fa87c/vobosep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bbcf78f-c50b-4663-ad5a-9144981f5b83/dazibujavaxaxonaroxenimul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8990032c-9166-4522-8ee2-676129e7952a/varemezufigudewatanurura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03f5d9f3-58b7-4edb-a708-8288c9f56b8c/32372144732.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_off0000fe06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE06 5496 bytes
SHA-256: 1de8ad0fc589a95de7769f6c797b0973465bff026689a9d4cfc8c863d622722f
font_01_sfnt_off000110dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DD 11192 bytes
SHA-256: 4706af943578b520ec23c286fce437831d4f4ba05ca6bad0826583d7fb5cde60
font_02_sfnt_off00013771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13771 16312 bytes
SHA-256: b2563e85233037e3c2780690ed1455257f868516b5a962e54e6ffe29314c9cb1