Malicious PDF — malware analysis report

Static analysis result for SHA-256 4753c517eaefd015…

MALICIOUS

PDF

93.3 KB Created: 2021-05-01 02:36:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1352e5a2f6b65a5bf8d1670001789995 SHA-1: 20ed392228b753ecc7d1f5d43686be5504a7ce44 SHA-256: 4753c517eaefd0156dc1352ddab93edbc4d639c0350187cbcbd7efebc9b640ca
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a high concentration on disposable hosting, indicating a link farm designed to redirect users to potentially harmful sites. The presence of external URIs and the ML classification strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/strik?utm_term=helter+skelter+meaning+lyrics PDF link annotation
    • http://eliyalte.com/guramakilasudolepativewabrqzb7.pdfIn PDF document text
    • http://online-bestshop.xyz/25711061143oiefw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492250/normal_60643f0524b58.pdfIn PDF document text
    • https://cdn.sqhk.co/fekurisakez/Jhfgiyy/30549971236.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454277/normal_60431f9f344a8.pdfIn PDF document text
    • https://cdn.sqhk.co/remigalakefo/jhfQgfs/nostalgia_meaning_in_english_urdu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405202/normal_606181edadde7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369501/normal_5fcb2b1841b68.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://oneplusonemain.xyz/551255071888s9gx.pdfIn PDF document text
    • http://helpverifybadges.com/libro_cabala_para_principianteswn0lr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469106/normal_605129efcc6eb.pdfIn PDF document text
    • http://imedo.ru/stokes_equation_weak_formw19dh.pdfIn PDF document text
    • http://wexypay.icu/fodobikesopisebojetoligoynbcn.pdfIn PDF document text
    • http://wwwbcpzonasegura-viabcp.com/321386242500bbtb.pdfIn PDF document text
    • http://bexukitekivotap.22web.org/27113911171.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xedovafimolodem.epizy.com/chrome_extension_er_media.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25bcaab8-5955-44f4-bff4-a55e0b103520/canine_mange_treatment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34e43af4-18ee-4f1a-80b8-d4c0af723da0/microsoft_excel_sheet_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1ab9ac0-fa79-477b-a10c-c44dda6b4d20/what_is_subaru_forester_premium_package.pdfIn PDF document text
    • http://pebulibupa.rf.gd/tarir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5b0220a-3d4b-4d47-80a3-478d5aa36998/kewarulogo.pdfIn PDF document text
    • http://wefubosapinu.rf.gd/sositeb.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_off00012df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF3 5244 bytes
SHA-256: 3b4354a4d94f256ebfa6c473555d4af17ab288ad45db97e9adf98658efa47a28
font_01_sfnt_off00013fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FBB 11924 bytes
SHA-256: 5ce371c465969db9ad673d5c1d16e148fff238c8efe1770cc407a7d29042205c

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