Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e94d93c9992d948…

MALICIOUS

PDF

72.4 KB Created: 2020-11-19 19:32:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fb14d724d3bc195ad6d0cb2f801c51b3 SHA-1: 367812be4a94f55f7a6638c827ec904ed343c4aa SHA-256: 3e94d93c9992d9481b33389529fbe0c76eb5d5545c76e0211374e7677437ee2f
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://trafffe.ru/123?utm_term=abs+scan+tool+with+auto+bleed PDF link annotation
    • https://demijejave.weebly.com/uploads/1/3/4/6/134607426/vekivujexida.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413373/normal_5f9600c14da72.pdfIn PDF document text
    • https://bosizeke.weebly.com/uploads/1/3/4/5/134596703/digukalozol.pdfIn PDF document text
    • https://rulovukefaz.weebly.com/uploads/1/3/4/7/134712077/799307dd0b8a1f8.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/b3606d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393898/normal_5fa57cc92edb5.pdfIn PDF document text
    • https://xijuwubime.weebly.com/uploads/1/3/4/2/134234920/f6e56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379355/normal_5f93aa2a886ea.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/gujutavevive/ganaxajusavixikunefavo.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/faronics_insight_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/vogewovu.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/19841040992.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/74727237165.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_off0000d1af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AF 5032 bytes
SHA-256: d09f0f7f406e03a01153b69a1ae6bfeef9f972cca78e063651542711213f391c
font_01_sfnt_off0000e2c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C5 10484 bytes
SHA-256: 1f8af92531efe3e8ab72d34f69a209112df522a3e530fcf3e5d9bb2ed03913fc
font_02_sfnt_off000106d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D6 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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