Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b35603df37c392…

MALICIOUS

PDF

87.8 KB Created: 2021-05-14 07:51:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99b0c60997bbf2bf8d91ce2938e9df38 SHA-1: 7826a4166a053f50180e5839fd20d543d19f8b5d SHA-256: 06b35603df37c3928405c6724251b85c46e8452ab0405082add43bd20ec3701e
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'resalured.ru', which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to a 'Delonghi oil filled heater manual'. No scripts were extracted, but the presence of external URIs and the ML/ClamAV detections strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/strik?utm_term=delonghi+oil+filled+heater+manual
    • http://neip-forum.fun/how_to_use_api_calcium_test_kitda2oe.pdf
    • http://mitsumoro.ru/wukegikifumokokbatuq.pdf
    • http://lezefax.22web.org/46499664193.pdf
    • http://moscowflowers.online/24_schwinn_sidewinder_boys_mountain_bike_reviewrxgxw.pdf
    • http://shopmzm.site/misularuzonembhd93.pdf
    • http://chambrely.xyz/banixixedonesalokdivhm.pdf
    • http://clipshd.design/jumpsuit_with_corset_sheinknsmc.pdf
    • http://exampl1214.com/49941123590i2brc.pdf
    • http://geesecam.com/176161584184zm1k.pdf
    • http://zazuvivilug.iblogger.org/bituv.pdf
    • http://lapugupofe.iblogger.org/83650891112.pdf
    • http://seplafond.xyz/gigaserolafiximusiwe0qgel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b45df409-8c45-418e-88b2-a56c4e58c63b/combining_like_terms_calculator_with_steps.pdf
    • http://rukinozo.epizy.com/85366115083.pdf
    • https://uploads.strikinglycdn.com/files/fadc0249-92f7-4cf6-849e-9a621c338a25/how_to_tell_if_a_function_has_a_jump_discontinuity.pdf
    • https://uploads.strikinglycdn.com/files/d7dc6708-c24a-4222-9ae0-4e7e70449a12/11498849732.pdf
    • http://pipimadural.rf.gd/jaxiwoxulomagulamoja.pdf
    • https://uploads.strikinglycdn.com/files/aa996e5a-9cfb-470c-94f8-eb0c0e9c0f1b/is_samsung_crystal_uhd_worth_it.pdf
    • https://uploads.strikinglycdn.com/files/68a80183-e01d-4ef5-8bcb-9e807804654e/ditudafasunabudijukix.pdf
    • http://vulekagezefodek.rf.gd/pidabijivaloxodilepu.pdf
    • http://guvamimifufirar.rf.gd/the_master_plan_of_evangelism_robert_coleman.pdf
    • http://bidexegope.epizy.com/kilpauk_garden_road_guideline_value.pdf
    • http://rotirokarovul.rf.gd/63278116610.pdf
    • 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_off00011591.bin
0ed71dad3793406e9e3d006f4a6799ae32aecfbde1e748e8c289fd1e4e89523e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11591 5144 bytes
font_01_sfnt_off000126e6.bin
944685a7bd46dc1c86160f86418d0dd3f7f6a94167774cafdf010cb416d2b552		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126E6 12904 bytes

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