Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a1ade40b02faf67…

MALICIOUS

PDF

69.7 KB Created: 2020-11-29 08:47:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6970f35894ca268857b95a0e407205b2 SHA-1: 61567690cabe3841adf27f7f768605028a78388e SHA-256: 6a1ade40b02faf67543105d597cc4ac3f33c614082cb0941fab6753c0ad2b7f0
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 0.9997

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://traffnew.ru/123?utm_term=arduino+gps+tracker+gsm PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454544/normal_5fbf026f20974.pdfIn PDF document text
    • https://pumutetigowon.weebly.com/uploads/1/3/4/6/134699291/79930e010b14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493602/normal_5fc1fa3d4d09e.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://s3.amazonaws.com/votubukaxogilix/brocas_de_perforacion.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/irony_worksheet_doc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3740cd62-290f-461a-9da4-41bbbeaebebc/terepewazorevuzadasufizak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e50667b7-7995-4421-91f5-9d646accfb68/dilbert_calendar_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/18764629980.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/gagiraj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da83e622-06a3-40f3-8419-c05c09a8c447/tutuzelox.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/pegivufisolol.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 2

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_off0000c57c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC57C 5296 bytes
SHA-256: c90b478e65201d7b39a31ae8838d7d3f55cbf76ed7da322e99b475ff2e221bad
font_01_sfnt_off0000d766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD766 10884 bytes
SHA-256: 64d97ee3d31f7cbc4425d25c23fa89c089bda1bc7704f5c46bdd9f76167992ab
font_02_sfnt_off0000fc9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9C 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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