Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc01c77c3adfcd8…

MALICIOUS

PDF

82.5 KB Created: 2021-04-18 00:32:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c26242c8f6f4f990d0dcae462b567970 SHA-1: cf4cf917a524a1e53cfda2ee305a8a6c707e5cb3 SHA-256: 0cc01c77c3adfcd82b6ca9ba53344de1c0c952cdfdccf22b1bcb5ef4d4338713
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The embedded URLs and the heuristic firings strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/strik?utm_term=car+rental+contract+sample+pdf PDF link annotation
    • https://zidadosivifaju.weebly.com/uploads/1/3/0/7/130775619/5379603.pdfIn PDF document text
    • http://kapovulup.mywebcommunity.org/html2canvasmake_angularjs.pdfIn PDF document text
    • https://kazanuwe.weebly.com/uploads/1/3/2/6/132683097/tinojiwik-tugitanoka-gisoba.pdfIn PDF document text
    • https://dubibezu.weebly.com/uploads/1/3/1/4/131453247/e36aa.pdfIn PDF document text
    • https://gazukevofuw.weebly.com/uploads/1/3/4/5/134597640/3661121.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465556/normal_5fd3d9201d6b3.pdfIn PDF document text
    • http://tixaman.scienceontheweb.net/ctet_question_paper_2020_download_in_english.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462075/normal_5fd297360ba9f.pdfIn PDF document text
    • https://pobafegesodagiz.weebly.com/uploads/1/3/4/3/134305133/sukenem.pdfIn PDF document text
    • http://lilozekakotelup.sportsontheweb.net/2885463051.pdfIn PDF document text
    • https://gukulijavezo.weebly.com/uploads/1/3/4/7/134714581/9288690.pdfIn PDF document text
    • http://dapurixid.sportsontheweb.net/format_of_experience_certificate_for_civil_engineer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411479/normal_606d959cc153b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389805/normal_600fcb4937174.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_6039287848b54.pdfIn PDF document text
    • https://tonavamajarow.weebly.com/uploads/1/3/4/6/134694337/1659610.pdfIn PDF document text
    • https://viwezoluzuwa.weebly.com/uploads/1/3/4/4/134401695/3424db7b.pdfIn PDF document text
    • https://bamukafigozoxin.weebly.com/uploads/1/3/4/8/134861202/batelefajaboluteme.pdfIn PDF document text
    • http://fumatiw.mypressonline.com/90939344777.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/1f36483f-c628-49b7-baa2-852d96322336/6921107713.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/597c554b-e71c-4350-bd10-6b066b408b84/59927346080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99ffe9b1-524c-4bc7-aaaa-ebd6b106ae42/how_to_put_grass_catcher_on_craftsman_mower.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001052f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052F 5208 bytes
SHA-256: d4b986d0205f1dc25b1be1a12598f30c4b1ecdaf4fbc59871326c5b6d064ceaf
font_01_sfnt_off000116cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116CC 10696 bytes
SHA-256: b73af5caf5690fe86e34190862218e07da4604ec520f9b15196d2d6bc5ef823f