Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbbc72f64e25a826…

MALICIOUS

PDF

69.3 KB Created: 2020-12-24 08:45:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d321cb4de70a607361a956e59933880b SHA-1: 2a240ebcb80562e3f19af5b1bb23b860b43f8bff SHA-256: fbbc72f64e25a8263407ace9818217da4905daaf4a800cb5ce1b2fdea32cf0e8
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The document contains a large number of external links, suggesting it functions as a link farm or phishing lure. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to direct users to external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/strik?utm_term=university+of+miami+football+tickets PDF link annotation
    • https://semopadilined.weebly.com/uploads/1/3/4/6/134696525/665195.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368956/normal_5fd7baf72b4d5.pdfIn PDF document text
    • https://sivagodumojuji.weebly.com/uploads/1/3/4/2/134235915/f732663cd.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/9373972.pdfIn PDF document text
    • https://fuvapevamasazu.weebly.com/uploads/1/3/4/5/134507747/rerabewojokisus-pitevod.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/1967afe4-250c-4245-b3da-2b0d069159f9/the_real_barenziah_v2_daggerfall.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1503e1fb-a2a1-47eb-8ca9-8ff2e40d371e/56095584874.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdcd8891-1010-4fab-bf89-88379175535a/71163370919.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d3f3eed-c3b6-44df-b02f-499f77dbaa84/best_day_of_my_life_karaoke_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bb7b8f8-62d2-4ae3-a1ea-ad5d9eac8868/83791448538.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b987c7a-6f1d-4fe5-a56d-ad9f3c35ab66/kinaripisut.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_off0000d2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F8 5384 bytes
SHA-256: b48aa76b5d0dc4fcdb3e171353829a4cbe4daf94234e07116eff5359396645b4
font_01_sfnt_off0000e544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE544 10372 bytes
SHA-256: b78fe8db1edf0bd59a2c25c6d20b03bdcc448573e7423cc4287f9727dcafdef4

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