Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f79ee95c0f32beb…

MALICIOUS

PDF

65.9 KB Created: 2020-11-23 21:16:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0b7328b0759f555ac5873bbd9dbba53e SHA-1: bf138d1e153370e1653e36d62c746943ef2277d5 SHA-256: 2f79ee95c0f32bebda71e81d9558848f5f180294c86e31c4272cd4da9fc8e434
214 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 and routes users through malicious redirector infrastructure. 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?utm_term=original+sin+movie+download+in+dual In PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/kiwukox-kokatokidiza-kazuliju.pdfIn PDF document text
    • https://kinijenu.weebly.com/uploads/1/3/4/6/134641264/e2d875f087c533.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/wexukufedepim/collier_county_arrests_log.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddc90027-3bab-4f23-aff5-93381efb4372/81583146265.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8eb8a0a-5ed4-4481-abc2-b227aa236273/delepunefejadobasetat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4bdff72-062f-483b-8870-8ca66f7268f0/49606089678.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acece740-565e-4fe6-83ee-7c2156f599de/problemas_de_regla_de_tres.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50a06233-d29a-4008-975b-7a1038d13e55/site_de_logiciel_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a290fa12-c228-4b69-9999-f83343aa2446/88879299142.pdfIn PDF document text
    • https://s3.amazonaws.com/fasotajedag/jivusolefov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea70e759-5b86-467a-821d-2e8725ea7de7/petenwell_flowage_ice_fishing_guides.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_off0000b935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB935 5124 bytes
SHA-256: 10f76a429793b0991787fb292add4343e6e16c43768e72f431024968a4966a61
font_01_sfnt_off0000ca92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA92 9968 bytes
SHA-256: 98f5bbce59a2ffee54276953d2fa38495402dc60c3b2df20fb2c76d189668798
font_02_sfnt_off0000ecb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB0 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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