Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4547cbe573907a0…

MALICIOUS

PDF

69.2 KB Created: 2021-01-10 05:47:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 6a16ef7502aa00f13ee876e03f234fb9 SHA-1: ed5bd9497f14e0cb022aae5cdce3a98194f6370b SHA-256: f4547cbe573907a07f72c8efac0a03bb0d023ba6d59436a63714ba13dcb09ab3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document is classified as malicious by ML and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The document contains numerous external URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the ML_NYX_PDF_MALICIOUS heuristic strongly suggest the document's primary purpose is to lead the user to a compromised website.

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 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://traffset.ru/123?utm_term=natrona+county+school+district+transportation PDF link annotation
    • https://site-1173584.mozfiles.com/files/1173584/ruzozotepeguguzel.pdfIn PDF document text
    • https://julapaxukej.weebly.com/uploads/1/3/4/4/134492969/7509527.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463803/normal_5fd1403e66502.pdfIn PDF document text
    • https://site-1174146.mozfiles.com/files/1174146/43446213370.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/LjhjbB0/car_x_drift_racing_mod_apk_hack_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/c11f3ge/68322249396.pdfIn PDF document text
    • https://site-1178342.mozfiles.com/files/1178342/slideshow_template_after_effects.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372355/normal_5f8fa5878602f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490528/normal_5fd317611682f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376125/normal_5f8b60cf2a27a.pdfIn PDF document text
    • https://weritesi.weebly.com/uploads/1/3/5/3/135314652/932abda.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/xafaxotaful/kuzor.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_off0000c41e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC41E 4996 bytes
SHA-256: b6979f1776ec587923e8d442c663b0a4f55824485d81fe019419311c22501991
font_01_sfnt_off0000d50b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50B 10688 bytes
SHA-256: 9f9cfca28233ae44238a8c9458ef0cc49ed44952a81d09a11fc9e39d4f74a9e5
font_02_sfnt_off0000f9a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A0 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

Open this report in the interactive analyzer, or submit your own file for analysis.