Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0ca3d967f220ade…

MALICIOUS

PDF

82.8 KB Created: 2021-03-28 22:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36f0364d470b76a04e2c814832742e81 SHA-1: 1790b53d9d2b8157357bca7139370b2ca8ddb2bf SHA-256: c0ca3d967f220ade2e97b41f225ee568de5b83a83cd068cdc5bdd9c0aa3141f6
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. The embedded URL, https://xezojetit.ru/award?keyword=pdf+file+format+error, is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a 'PDF file format error', which is a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/award?keyword=pdf+file+format+error
    • https://cdn.sqhk.co/mogizilo/nja5Aje/gizezisetotusafeg.pdf
    • http://help-feedback-amzn3.xyz/croup_treatment_guideline95w4b.pdf
    • http://winsbig.space/9742317463678m8f.pdf
    • https://cdn.sqhk.co/zidodovare/q7iaUhb/vivafo.pdf
    • http://eroganoficial.site/metastasis_adalahu09ii.pdf
    • http://cashbackmoney.info/rosie_revere_engineer_read_aloud_questionsfuyhe.pdf
    • https://cdn.sqhk.co/puburikob/yLgjFV0/vununifivozibemot.pdf
    • http://betizekaxu.getenjoyment.net/scratch_challenge_cards.pdf
    • https://cdn.sqhk.co/gagadobuv/Ii19hbJ/81030366596.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://vadititemudifi.rf.gd/bilixebogejixuzotogeb.pdf
    • https://uploads.strikinglycdn.com/files/60c72c2e-cedd-4ec2-9479-dc365acfc094/xanathars_guide_to_everything_racial_feats.pdf
    • https://s3.amazonaws.com/dutuzanob/36332630730.pdf
    • https://s3.amazonaws.com/vinejivunitego/sense_sensibility_and_snowman_movie_youtube.pdf
    • https://s3.amazonaws.com/jeponowon/happy_endings_reunion_streaming.pdf
    • http://babevuzax.epizy.com/cashmere_cat_album.pdf
    • https://s3.amazonaws.com/nilafafakem/zadepobejekizufefepago.pdf
    • https://uploads.strikinglycdn.com/files/709ddf09-cf0d-4564-bc65-da67056adad2/what_are_good_names_for_big_dogs.pdf
    • http://jimomurapujivo.onlinewebshop.net/79336958471.pdf
    • https://uploads.strikinglycdn.com/files/0c847592-ae23-47a8-a761-dc1263b35f88/kubamebolifazekurad.pdf
    • https://uploads.strikinglycdn.com/files/19dc8307-0f8d-4caa-b8ed-005a18c376f7/761672133.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8e6.bin
d49d182e76ae4c00786b4ae9a1073621a5ae92cc9314db270fcdb82e93b4f438		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E6 4556 bytes
font_01_sfnt_off00010859.bin
4f798ce66ddee82bc1507e7e4a981e76f5601c03b3ba7c012c47abfef95192fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10859 11052 bytes
font_02_sfnt_off00012dfd.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DFD 4324 bytes

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