Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0153202b571fc41…

MALICIOUS

PDF

76.9 KB Created: 2021-03-05 05:53:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a54f85a25c23d9e3d9eec2aa62b8044f SHA-1: 5e5fedaba534f3678ca7e192db8d1e2d8a6f895d SHA-256: d0153202b571fc419f94dd1caece3b0ee02210409160599a093d48f15adae6b9
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://xajibur.ru/123?utm_term=epson+wf+2630+printer+printing+blank+pages PDF link annotation
    • https://damemerivojed.weebly.com/uploads/1/3/4/3/134378109/a1dda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425917/normal_604012155a9fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417419/normal_6040a6f06a4bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444378/normal_60003fd05926a.pdfIn PDF document text
    • https://robivobaxo.weebly.com/uploads/1/3/0/8/130873737/karuki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454052/normal_5ff1cf9d27361.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465024/normal_5ff93502bc26f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402956/normal_6040174480fae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529893/normal_6025077d21079.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420434/normal_5fc5d9536ba0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463788/normal_5fdb86f39ef95.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/28e0884b-26db-46e0-a3e0-685aa18d3aee/how_to_calculate_compound_quarterly_interest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a5ac9f7-924e-4470-b910-c26d90383796/galevazoxosenogitate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f689fd1-1ce6-4724-9390-7d85c844a330/rotegijakutagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/744ea92d-cb56-48f9-87b8-5b32e9020b8e/35733383354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95c2e201-a7ce-42c2-a7cb-afe2a7e7575a/patudiduvewogugexuvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2092448d-eced-4082-bd7b-b1786c16e8c0/how_to_pair_a_soundbar_to_a_vizio_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7993671-6156-41f2-99c2-828c3829632e/how_to_solve_2x2_rubiks_cube_in_2_moves.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7C 5916 bytes
SHA-256: da34fa9258766af8f3fcb1cb2a3e51812f37f36549e634baa6c3d1254a259a33
font_01_sfnt_off000102c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C0 10376 bytes
SHA-256: 7207af8e7fc3793f937cb9a44c578a8360c9e51666a49b3dd2da15fe4c5eaff3

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