Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a9479e2c4f02693…

MALICIOUS

PDF

75.8 KB Created: 2021-05-23 14:57:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0e54f99b856f4effeb7cb424ace6e24d SHA-1: c1bdf67790235d4383f0c3a5d98d4f9dc23e7e7a SHA-256: 1a9479e2c4f026938305365c22f6195481e6c968aca9255f64df45379b5e6147
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 0.9998

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://maypoin.ru/strik?utm_term=windmax+induction+cooktop+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408583/normal_5fdc701c18051.pdfIn PDF document text
    • https://rezikixudagip.weebly.com/uploads/1/3/4/7/134746502/2191293.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490523/normal_6011db88ef5e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411490/normal_5fcb2cdad5083.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458413/normal_5ffb422b018b4.pdfIn PDF document text
    • https://mapaforidax.weebly.com/uploads/1/3/4/0/134012560/166808.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368762/normal_6041b81da82df.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/dujibenivexoxazorof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be70cbc0-f407-4b9b-9a8a-17b4bc85de65/the_little_book_of_talent_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e3f92cf-9ebe-4726-8800-d4d6efaf6936/how_do_i_get_my_plantronics_headset_to_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c687500f-cd11-470a-a9d9-c0ebf4ae0019/best_gmat_preparation_books_quora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/668e92bb-d8b7-4d86-bf02-34c67a9f7052/evenflo_safemax_infant_car_seat_rear_facing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3268eafd-a829-405a-b3a4-29181675bb54/lipatelipoguruta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f757e9fd-2ec6-4689-ae9d-2bb3543ac9bf/software_engineer_technical_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/astroneer_gateway_engine_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33b7c936-0864-4c7b-a6d1-ef569ce82f4c/71834988430.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad1c777e-c96a-4d5a-b876-8041dcffa7c9/vijuvesorevol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66882a51-a444-4da2-a571-e8e2e8d3d836/how_old_is_tris_divergent.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE142 2880 bytes
SHA-256: 80960c5ef920dc812f40421d0c41ad5272b60f71c1256c1bdf7a11afd8d5b2df
font_01_sfnt_off0000eb7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7F 5092 bytes
SHA-256: e43c73c4686ea52031b4c8d429d00cba3eb65496ae24c91261e3e03815e23e4d
font_02_sfnt_off0000fcd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD3 10756 bytes
SHA-256: 21bd48e7505ef149e73c792121da2b8c20db874e5c82ed08610bcf3a7e56bfc9

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