Malicious PDF — malware analysis report

Static analysis result for SHA-256 224079615ddf117b…

MALICIOUS

PDF

82.9 KB Created: 2021-03-27 22:25:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 13709f749753471effd84ea904723ef8 SHA-1: 72223181650d0eb4679f1e50e22bc9cf9c75b7ce SHA-256: 224079615ddf117b6089afcc2260d39bcd1e2d61ab7a5c2d424cfa67d9d68191
186 Risk Score

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 0.9990

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jottigo.ru/award?keyword=behringer+xenyx+802+manual+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382953/normal_5fe9b64521b45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371003/normal_60536da43f547.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501046/normal_5fd83090e776b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369796/normal_5fe5b1a7af16b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425504/normal_605f49f7df0af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419218/normal_5fe8775a4a299.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410954/normal_604145c730626.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374024/normal_5fe9fc9a9ffa1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402707/normal_6004779738901.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404528/normal_5fc7fd11eafaf.pdfIn PDF document text
    • https://cdn.sqhk.co/navififoro/hiUijha/miniclip_games_bubble_trouble.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463034/normal_5fd37a3a1e963.pdfIn PDF document text
    • https://cdn.sqhk.co/gotofebelu/ZTVG9Jr/toyota_tacoma_x_runner_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488332/normal_5fe46ba0d80fb.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/jewizopukuni/vamuxowadapepomimupi.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/vidogefojaletoweve.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/writing_academic_english_alice_oshima.pdfIn PDF document text
    • https://91506351-5699-48ce-85e7-8e7d071f4e87.filesusr.com/ugd/d775a9_80e6af2e452e499e9c6bc2745f86969a.pdf?index=trueIn PDF document text
    • https://39ad70c8-6a03-4de2-a89b-b0209cba5754.filesusr.com/ugd/d2759c_748105ae9a6046cda0888c975db5bb38.pdf?index=trueIn PDF document text
    • https://b1e6e3cd-24a2-426a-8b7d-e8f4bd81915b.filesusr.com/ugd/83e584_b4db691cd6434ab8a432edb9467675b1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/wetiregejuxag.pdfIn PDF document text
    • https://2d66045e-c276-4037-81df-184b25840e97.filesusr.com/ugd/cdf3e3_9cde6699c10648909e64ea1dad191b1b.pdf?index=trueIn PDF document text
    • https://1350f94c-8d6f-42b4-8351-24983ad6a49a.filesusr.com/ugd/4aae87_54506ed8ab7547989ff8fa14e4e82b63.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fatisake/volisumivalikizanazup.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_off0000f5f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F9 5964 bytes
SHA-256: 39985353abc926f556e116b1cd244c052cf8af0c2d0cb3ea555c40e2e7b0aa1e
font_01_sfnt_off00010a25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A25 2940 bytes
SHA-256: a834da8246b516c6707524d400e2403f9d65e9b25d97f56ec6f6c843c8b58120
font_02_sfnt_off0001167e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1167E 12428 bytes
SHA-256: b3e0d579f5f4c8ecaf408ad0f51053a0149cb88013db278c243050f3e0ee03f6