Malicious PDF — malware analysis report

Static analysis result for SHA-256 d00e2cda5884dd8d…

MALICIOUS

PDF

75.1 KB Created: 2021-03-05 15:42:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96f4fd52b2b8b8c7832f32bffc4d3f97 SHA-1: 2cd797f32cc5458b16e9bb651148aea4fc03bde4 SHA-256: d00e2cda5884dd8daa3e947804840985737a8c442e6a5f1866651c41f6078396
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URLs, such as https://xezojetit.ru/strik, are likely used to redirect users to malicious sites or to distribute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/strik?utm_term=what+is+the+fivefold+ministry+in+the+bible
    • https://static.s123-cdn-static.com/uploads/4483587/normal_5febd55ad7a09.pdf
    • https://sejumajofejopib.weebly.com/uploads/1/3/2/7/132740214/fimar-tanatid.pdf
    • https://fuluposusiziz.weebly.com/uploads/1/3/5/3/135321682/manutifotosu.pdf
    • https://cdn-cms.f-static.net/uploads/4388276/normal_6026c55539a28.pdf
    • https://cdn-cms.f-static.net/uploads/4374860/normal_6038496054a4f.pdf
    • https://cdn-cms.f-static.net/uploads/4495240/normal_5fd2832f38bdf.pdf
    • https://static.s123-cdn-static.com/uploads/4464534/normal_5ffde5ee3ca9c.pdf
    • https://cdn-cms.f-static.net/uploads/4422627/normal_602d568c451e5.pdf
    • https://cdn-cms.f-static.net/uploads/4479688/normal_6011833b1b8e6.pdf
    • https://gigumozogewa.weebly.com/uploads/1/3/4/5/134597084/f69b105b7045e7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xujitezu/vefasibepukure.pdf
    • https://uploads.strikinglycdn.com/files/0e479a0d-5f0a-4126-8ce1-1013ac11ba06/40890333254.pdf
    • https://s3.amazonaws.com/lekezaru/kovowedowolofo.pdf
    • https://s3.amazonaws.com/lakadutof/aqa_gcse_physics_past_papers_answers.pdf
    • https://uploads.strikinglycdn.com/files/2bb9695a-b354-46ba-8d40-9d165d3368b5/samsung_grand_prime_battery_replacement.pdf
    • https://s3.amazonaws.com/piradi/zadubamagusozolebofezafe.pdf
    • https://s3.amazonaws.com/risisipajole/alienist_imdb_parents_guide.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e917.bin
79c21b99443798628c78dd414e3f59892e97fde6d277e4afbcc473e12417d501
pdf-font-stream PDF embedded font (sfnt) at offset 0xE917 5460 bytes
font_01_sfnt_off0000fb92.bin
af6f00843ee93047b0a78cbdc5dd071f18c5ba402df7a928d6211994e585570e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB92 10380 bytes