Malicious PDF — malware analysis report

Static analysis result for SHA-256 632c822a4000df49…

MALICIOUS

PDF

73.6 KB Created: 2021-03-10 19:51:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbd0f5b3d8727ee5fca49da125e1805b SHA-1: 65b22d39c006ec6b1c52077c0307345e95953b26 SHA-256: 632c822a4000df49c8efdadbf94f701fc8c840d345421ed3f4497fbeea692a38
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'Labour law and employment manual pdf'. The presence of numerous external URIs, including a link farm on disposable hosting, indicates an attempt to redirect the user to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pelibifir.ru/award?keyword=labour+law+and+employment+manual+pdf
    • http://xitodefigatefuj.medianewsonline.com/setole.pdf
    • https://fetubuka.weebly.com/uploads/1/3/1/3/131379928/1411527.pdf
    • https://cdn-cms.f-static.net/uploads/4383702/normal_602c57bd26557.pdf
    • http://duxojiz.iblogger.org/bavapolig.pdf
    • http://ritixibetono.mygamesonline.org/2012_vw_jetta_dsg_transmission_fluid_change.pdf
    • https://cdn-cms.f-static.net/uploads/4365547/normal_603bffbb1263a.pdf
    • http://sagedix.medianewsonline.com/12395894266.pdf
    • https://budozawepolok.weebly.com/uploads/1/3/4/8/134852557/2121776.pdf
    • https://cdn-cms.f-static.net/uploads/4450512/normal_5fd3953324aaf.pdf
    • http://kixumitusomu.iblogger.org/70949201410.pdf
    • https://cdn-cms.f-static.net/uploads/4469350/normal_601242b03b4fd.pdf
    • https://static.s123-cdn-static.com/uploads/4459320/normal_5ff7108dbaf74.pdf
    • http://towonededuv.medianewsonline.com/wheres_hot_in_march_abroad.pdf
    • https://vimugowome.weebly.com/uploads/1/3/4/3/134323071/5c263ebe1b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pujumek.myartsonline.com/xofanawif.pdf
    • http://zubiluwetij.myartsonline.com/medicaid_doctors_in_dewitt_michigan.pdf
    • http://losamipivoku.epizy.com/fugukura.pdf
    • https://c2093f15-f4fb-4bda-9582-db5404103fa6.filesusr.com/ugd/b28561_3e5e9abfe36b4b22bafd4b37c8fbf87a.pdf?index=true
    • http://dukizovisepo.rf.gd/dafamuzexedegitixumukogo.pdf
    • https://db6d201d-bdff-4648-9982-d9cfaac7639e.filesusr.com/ugd/98857b_5885480b4e28464d952c9fb4b22a24ed.pdf?index=true
    • http://faxiruvud.myartsonline.com/genie_pro_screw_drive_learn_button_location.pdf
    • http://nitubak.atwebpages.com/isometric_neck_exercise.pdf
    • https://f6ce3cfb-f922-470c-9e0e-eaf724001b0e.filesusr.com/ugd/defcb2_5378e09712414eaeab7ac48bb6716a2e.pdf?index=true
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_2c2d456a0b084cc29f7dc5d59774f439.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3cb.bin
59e0c5154f0b4d1a3805a44ad1c27d9461ae481de2001eace42c8f54a9101ee4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CB 5284 bytes
font_01_sfnt_off0000f5c7.bin
478ae5916bbe7ab6d7faabd9e62d36ed626a586a8244955afa55f2098dfa0a53		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C7 10264 bytes

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