Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f1a4b0ad238f8b4…

MALICIOUS

PDF

83.7 KB Created: 2020-12-28 22:55:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a6320ab13ae44a4f5f6a1ad419976bfd SHA-1: 1cae54ad57b4a2a7706b067af8fce4c6d4e62d3e SHA-256: 5f1a4b0ad238f8b4226f34107e552a564c4c1f2554b31835c8189dfef01b360e
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 0.9996

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://traffking.ru/strik?utm_term=coda+music+app+review PDF link annotation
    • https://rarikomedos.weebly.com/uploads/1/3/4/6/134616559/5371133.pdfIn PDF document text
    • https://zimegusak.weebly.com/uploads/1/3/4/6/134605775/mawevus.pdfIn PDF document text
    • https://fevuxutub.weebly.com/uploads/1/3/4/1/134131759/nokorapima-jatojuxovi-wolojuluta-tifebuteseful.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/zuxadol/45645091297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2489a2f1-c8c1-4a3f-8aff-655edb8e10ea/11135294805.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/cain_abel_password_sniffer.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/47697292080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c50c6ba-b692-4a68-bc67-9038a2ac6af0/pathfinder_time_stutter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af25174b-7764-4205-bd4d-a18f26471f90/vabasixakerozis.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/pattern_of_newspaper_report_writing.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off0000f4f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F2 5244 bytes
SHA-256: 53014b92eb105aa6695c0bcd3dd2cb11bd3807f297d954e89d7b3928515779f2
font_01_sfnt_off000106bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BD 11016 bytes
SHA-256: b2115644a055028df94d54a27da7cfd4568298a45f55dfe35666d0c36563f545
font_02_sfnt_off00012ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA6 16312 bytes
SHA-256: 975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15

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