Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc41f992bd8aadb3…

MALICIOUS

PDF

63.0 KB Created: 2020-11-24 13:26:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: cfa136f4a0868265e07730d650e08785 SHA-1: bb1fee736fef264ae7e32b214e1da29499fcd2df SHA-256: cc41f992bd8aadb3c9d5f215a4f68fa6f7f05e4006308ce41d9d66e944ef762f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://trafffe.ru/123?utm_term=dave+chappelle+deep+in+the+heart+of+texas+stream PDF link annotation
    • https://durezeneb.weebly.com/uploads/1/3/4/2/134235042/wugikekiporox_latem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412773/normal_5fa8e4bc88958.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413362/normal_5f9969dd68298.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375207/normal_5f8bc58f0a141.pdfIn PDF document text
    • https://wuwoxidip.weebly.com/uploads/1/3/4/4/134492879/1556514.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/343b7a22-ad87-4d85-9f34-55414f624f33/74416530030.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/preguntas_y_respuestas_del_evangelio_de_juan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e53890c8-c83e-4423-9e46-96f72f38265d/professor_messer_ccna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e91fcbf7-6f08-4ba9-a736-c899f4b554a0/57951091910.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/80265115016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aabdee0-aea0-4ae0-9af4-fa358395ba44/mos_manual_usmc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d96d09c-4ef5-4537-b035-77dfb78c516c/globe_worksheet_for_grade_5.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_off0000ac4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC4F 5312 bytes
SHA-256: 2e7a8fbcb71febd6e72a011ab30aaa1de6e124cbefec3ba381dfae85b655a574
font_01_sfnt_off0000be32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE32 10448 bytes
SHA-256: b2c2175478036fe4f77bd539a039d7092337357151bb141073f091e98d8968ef
font_02_sfnt_off0000e0f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F2 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

Open this report in the interactive analyzer, or submit your own file for analysis.