Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a794d02db5d714d…

MALICIOUS

PDF

79.1 KB Created: 2021-02-23 00:29:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 32576881fa7253df0f7b91ab439de70e SHA-1: 90a1c53b224a72e85ec772e1054ff34f4267992f SHA-256: 1a794d02db5d714d89be3ffc9dbd5dac63326dae7db10b1b5f02c7ef8a725c74
126 Risk Score

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 pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though partially corrupted, indicates a lure related to a 'repair manual', aligning with common phishing tactics.

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://seumenha.ru/wix?keyword=rmw+2.2+g24+repair+manual PDF link annotation
    • http://xajekuk.22web.org/fifesaru.pdfIn PDF document text
    • https://wozuxepu.weebly.com/uploads/1/3/4/4/134478893/d484db.pdfIn PDF document text
    • https://sizamuvexiluti.weebly.com/uploads/1/3/4/6/134644091/455667.pdfIn PDF document text
    • https://cdn.sqhk.co/xugufufifo/JI1jggc/981138320.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459784/normal_5fc862c51cb0a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426830/normal_5ff6d5b1cc721.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404739/normal_600a4a1e089e4.pdfIn PDF document text
    • https://lenagalazipanom.weebly.com/uploads/1/3/5/3/135310064/referuz.pdfIn PDF document text
    • http://stikc.xyz/671546498nbob7.pdfIn PDF document text
    • http://fojowufuzuno.22web.org/35835501424.pdfIn PDF document text
    • http://instapriz.online/how_to_clean_burners_on_glass_top_stove16tda.pdfIn PDF document text
    • https://somigoduwus.weebly.com/uploads/1/3/4/4/134470899/kosuli.pdfIn PDF document text
    • http://natural-shop.info/mozovapetowvqrx2.pdfIn PDF document text
    • http://gratoram.site/jetaudio_music_player_plus_app_downloadzxu9t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500674/normal_5fe920bda4151.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
    • http://sidiwen.epizy.com/lagakomoxinezokeb.pdfIn PDF document text
    • http://nazifaba.rf.gd/natuluxadopikawaragusa.pdfIn PDF document text
    • http://darelarara.epizy.com/91994543519.pdfIn PDF document text
    • http://lonivone.rf.gd/72369945789.pdfIn PDF document text
    • http://dusitabupev.rf.gd/22538404458.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_off0000eb62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB62 5004 bytes
SHA-256: d138697e47a7605096b86cda5677328fe680d84b4c7f621d11bda03112d46135
font_01_sfnt_off0000fc59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC59 10812 bytes
SHA-256: 08ed0e69ff7b9e86eb0f6af7675a8750441c59c58ad9b8ada373ac70dd523210
font_02_sfnt_off00012135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12135 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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