Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd150704a90ac002…

MALICIOUS

PDF

63.9 KB Created: 2021-01-08 08:41:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 472a92e0d243b9a3c53770ad85972c91 SHA-1: a01f72c6a765469b1bb24270d2ac3a6e2bf78313 SHA-256: fd150704a90ac002d374f0dbaa263128b13fb73d65e992d865249cc4ce75c28b
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with a primary external URI pointing to 'https://traffnew.ru/aws?utm_term=electronic+structure+of+atoms+worksheet+answers', suggesting a phishing or malware distribution lure. The document body, though partially corrupted, indicates a theme related to 'Electronic structure of atoms worksheet answers', likely used to trick users into clicking the malicious link.

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 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://traffnew.ru/aws?utm_term=electronic+structure+of+atoms+worksheet+answers PDF link annotation
    • https://voziguwotameba.weebly.com/uploads/1/3/4/3/134345279/visokumevu.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/mjahjtC/space_flight_simulator_1._35_mod_apk_download.pdfIn PDF document text
    • https://zizolewezefid.weebly.com/uploads/1/3/4/7/134702939/7bd75eb.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/1jh1iad/69805163103.pdfIn PDF document text
    • https://pubategikosiw.weebly.com/uploads/1/3/4/1/134131453/ferupufibirazu_tetajafuju.pdfIn PDF document text
    • https://nukubutanedun.weebly.com/uploads/1/3/5/3/135309192/3982334.pdfIn PDF document text
    • https://bezesigut.weebly.com/uploads/1/3/2/6/132681157/5c407660926.pdfIn PDF document text
    • https://boviseweduxiraz.weebly.com/uploads/1/3/0/7/130776594/1143814.pdfIn PDF document text
    • https://bisatabezuniv.weebly.com/uploads/1/3/1/3/131398333/tupasi.pdfIn PDF document text
    • https://cdn.sqhk.co/disegivoji/biheMha/zodewoluwatutuwedumajam.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/wukara/kudaruwanuvosoxakomowafe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab853dcb-4e27-4970-9144-a31dca0e5686/17436000105.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/simuzifobinumejak.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_off0000bcef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCEF 5236 bytes
SHA-256: 29de67ed82a739837ec35f8084c5e63e47b6fab00d8f4bfd4575aab72fe050b2
font_01_sfnt_off0000ceae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEAE 10480 bytes
SHA-256: 0aee1f266e191b665be72ed9daafe9354612bba05479fcda947aee4d4c143d5a

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