Malicious PDF — malware analysis report

Static analysis result for SHA-256 74e82226352b457c…

MALICIOUS

PDF

74.7 KB Created: 2021-06-08 04:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 4929d4254a9576645a7924244399778a SHA-1: 0a7adc66d4e0172dc4c1b473c4271bc935d3876b SHA-256: 74e82226352b457c16a8ed588a05a6f7d6d9756aadec90bc048945267d56d71a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO spam campaign. The document body, though heavily obfuscated, contains text related to talking to strangers on Facebook, indicating a lure for phishing or malicious redirection. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://archism.ru/pbw?utm_term=como+hablar+con+un+desconocido+por+facebook PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414360/normal_5fdc7efcae4d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385217/normal_5fd67a24eba91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466657/normal_60287f6fbe5cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367940/normal_603ed0e1af8e3.pdfIn PDF document text
    • https://finukapaxareb.weebly.com/uploads/1/3/4/4/134494590/gegaze-lidemiwuwip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465396/normal_6045fc914b0e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486565/normal_5fe8fd1c1a3b6.pdfIn PDF document text
    • https://famixupeb.weebly.com/uploads/1/3/4/7/134733803/jixoroxepaxema.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481852/normal_601bd0cac6cda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464323/normal_605b620624d63.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463803/normal_5ffdade8058df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411503/normal_604ae0fe9e0f9.pdfIn PDF document text
    • https://xinujulajupi.weebly.com/uploads/1/3/4/3/134321003/afbfb81de76d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402718/normal_60b82df96d9c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388037/normal_60248f0cccf9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389361/normal_601dd4b1d42f4.pdfIn PDF document text
    • https://nakosedamewa.weebly.com/uploads/1/3/4/6/134612328/d43562a4cf4.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/c21c459f-d88b-466b-a599-d45529a7d829/how_to_explain_quantum_computing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6e1bd09-5c10-449f-be92-2cd853d8a4ab/best_book_on_project_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1090fe05-e1a6-47a2-861e-8f7fb0bbf8f6/book_of_questions_pablo_neruda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51355630-04b4-452d-9d10-5d97f903947b/99850552788.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_off0000e212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE212 5504 bytes
SHA-256: 03666e6acb349429efede1571013eb1f951b28c9c2252e371b7696484ab26bc7
font_01_sfnt_off0000f490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF490 12036 bytes
SHA-256: 81beb2fcceebda7de46c17cf086cf697f911e5f8c75dbdd1cbdbb8eee0311029

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