Malicious PDF — malware analysis report

Static analysis result for SHA-256 d97ea7808604af79…

MALICIOUS

PDF

74.6 KB Created: 2020-11-18 23:47:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f09ceab92823fa4c6fa8c6778b4e7205 SHA-1: 97ce46f045c43343acadb05adf42e4aea2ae0001 SHA-256: d97ea7808604af79ec3b6d1a441af88126944531335a23be46b821de4f947652
186 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 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://traffking.ru/123?utm_term=consolations+of+philosophy+alain+de+botton+pdf PDF link annotation
    • https://saloramorolo.weebly.com/uploads/1/3/4/3/134307331/7543360.pdfIn PDF document text
    • https://gazofifato.weebly.com/uploads/1/3/4/4/134496451/4634101.pdfIn PDF document text
    • https://wozofawado.weebly.com/uploads/1/3/0/8/130874325/fowunosikuni-puzuno-vikakuto.pdfIn PDF document text
    • https://faxilazow.weebly.com/uploads/1/3/4/7/134725206/latanusub_dopifojo_tikatibolabe.pdfIn PDF document text
    • https://fewarixavaj.weebly.com/uploads/1/3/4/8/134847043/4c0017c.pdfIn PDF document text
    • https://gavojaxuwutik.weebly.com/uploads/1/3/4/3/134319320/41e356d7.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/sikuva/24088867432.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/12353292401.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/28347265034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48d7fffd-1784-4bd4-8bfc-f4b6597fd2fe/13948786904.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0e4a645-8bb4-40d1-8bb2-b335d22e2c9b/lg_direct_drive_washing_machine.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE592 5180 bytes
SHA-256: beb4270acc38df5a9a335b4bcc63ca9f8e63f5ea6d35e153b906d24300d13b35
font_01_sfnt_off0000f732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF732 11276 bytes
SHA-256: 253a74927db7c4181276f7cb9b889874720db05544ecbf7139226d8750966c31

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