Malicious PDF — malware analysis report

Static analysis result for SHA-256 382718f32e73c628…

MALICIOUS

PDF

67.3 KB Created: 2020-11-23 03:04:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ce89657acafbf3af52e09fbc15d0a659 SHA-1: d3d83ae445dbd5ba3ff907aec9c50f83d9ecd8a1 SHA-256: 382718f32e73c6282ad379db16afed6c06527820be112c9bdcb94b4a1fe10a5e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, https://trafficel.ru/123?utm_term=alicia+brito+fort+collins+colorado, is suspicious. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

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://trafficel.ru/123?utm_term=alicia+brito+fort+collins+colorado PDF link annotation
    • https://kuvofexe.weebly.com/uploads/1/3/1/1/131163751/a074725.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/7854898.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/busutafitufe/terrestrial_photogrammetry_surveying.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91c87f1d-9374-4155-8322-8fdcc6728586/the_challenge_of_democracy_janda_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/48875406544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3b338b1-da33-4c32-9234-14df192bf0ff/65299631544.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/kugupifukixo.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/mitavab.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/10_lincoln_square_worcester_ma.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/kawusigizuri.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/free_robux_2018_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/irregular_verbs_past_simple_and_past_participle.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 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C8 5144 bytes
SHA-256: 9df270a79905fc1af57195e9842bcd674e525c96a5597f83294ff6c3b0d9627a
font_01_sfnt_off0000db50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB50 10984 bytes
SHA-256: 511ca9039691de02b0c681e910ef5d9e1cbf15fe21648b4b12f0b6d334c6ee95

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