Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d269690d8d99e02…

MALICIOUS

PDF

88.3 KB Created: 2021-05-28 15:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b965bd3ee3a328bb610c99ece4d75d18 SHA-1: 2e15abd6b1f2577654476e455b855d05faf4584d SHA-256: 0d269690d8d99e029df53f69ae50f727c6f88f1fc910ebbcc0a018cfa86908fb
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The presence of a 'utm_term' parameter in one of the URLs indicates an attempt to track user clicks, likely for phishing or malware distribution. ClamAV and ML classifiers also flagged this PDF as malicious, supporting the assessment of a phishing or malware delivery attempt.

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://lozipotod.ru/strik?utm_term=software+testing+principles+and+practices+naresh+chauhan+pdf+download PDF link annotation
    • https://karifizamazo.weebly.com/uploads/1/3/1/3/131383674/refopajosudep-welesifib-siviravegike-fivubobowunin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387817/normal_5febc79cc36c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409806/normal_6042db9e1565d.pdfIn PDF document text
    • https://jozudepixivi.weebly.com/uploads/1/3/4/6/134682498/3236613.pdfIn PDF document text
    • https://kilogabofavelu.weebly.com/uploads/1/3/4/5/134589148/pokobulav.pdfIn PDF document text
    • https://puzapageduz.weebly.com/uploads/1/3/1/4/131453954/4167041.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368962/normal_5ffeb88132391.pdfIn PDF document text
    • https://nogikukejigili.weebly.com/uploads/1/3/0/8/130873965/8837346.pdfIn PDF document text
    • https://pudakelujoroju.weebly.com/uploads/1/3/0/7/130739680/9740c60b9550a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378827/normal_600ec2912049a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485152/normal_5fc5d391a20f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409420/normal_5fc9b16f6a2bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407086/normal_60600933c9f0c.pdfIn PDF document text
    • https://gitapobukelagij.weebly.com/uploads/1/3/4/2/134266265/3467432.pdfIn PDF document text
    • https://widosutolitidaf.weebly.com/uploads/1/3/4/8/134847614/fibonelem-rovipajukefuxe-mojem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416806/normal_6018b7ee832e3.pdfIn PDF document text
    • https://logutidukikov.weebly.com/uploads/1/3/1/3/131380383/buzusis.pdfIn PDF document text
    • https://podosutopo.weebly.com/uploads/1/3/4/5/134590637/fumisomulon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393755/normal_6062e569b6f6c.pdfIn PDF document text
    • https://lonopenofof.weebly.com/uploads/1/3/4/8/134895818/2e0dade6.pdfIn PDF document text
    • https://jesilezozuzi.weebly.com/uploads/1/3/4/7/134745232/bezumuwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453906/normal_60295600adaf7.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
    • https://uploads.strikinglycdn.com/files/a1544d94-2a4e-4ab5-8f39-fc6f6b6eccd7/9167715692.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0bba5b4-73a2-4dd6-a001-684015078393/vizomesunirorawupegitune.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_off000107af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AF 5496 bytes
SHA-256: b0a8f569fa7aa4efaeee58a2ac42db015fb9d7229730f7064e66a12abd371fb6
font_01_sfnt_off00011a5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5D 13200 bytes
SHA-256: 3869645bbed41b9ea026ac19a7119a6b9192d29440dc12574436f2e23d1fc3e7
font_02_sfnt_off00014481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14481 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176