Malicious PDF — malware analysis report

Static analysis result for SHA-256 7313df009ffbb38b…

MALICIOUS

PDF

76.8 KB Created: 2021-03-12 02:49:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: a4338e78c6749ec89f36c2df0e6a1e91 SHA-1: 63ddf81b360e9408c4c2e4589bed7d3f87ce37ad SHA-256: 7313df009ffbb38bf66ac6311c1e22448fb0c3a0b2c4ecfa150707ac1c40a04a
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document body, though heavily obfuscated, contains references to 'breath holding spells treatment pdf' and an external URI pointing to 'dugedepap.ru/award', suggesting a phishing lure. No scripts were extracted, but the presence of embedded URLs and the nature of the detection point towards a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/award?keyword=breath+holding+spells+treatment+pdf PDF link annotation
    • https://cdn.sqhk.co/gegenosuzun/hijiz96/cut_up_lyrics_thug_brothers.pdfIn PDF document text
    • https://cdn.sqhk.co/netimawifes/jbXhd5c/tulavegekofuvezamelo.pdfIn PDF document text
    • https://cdn.sqhk.co/kobewudojuvo/ijgjOgf/verunazelojalekavore.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/iVhjgeZ/wumenuxe.pdfIn PDF document text
    • https://cdn.sqhk.co/sobupepokor/jggcgf2/marshalls_near_me_open_now.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fexewon.rf.gd/zesasuse.pdfIn PDF document text
    • https://s3.amazonaws.com/xofalepelala/21223332664.pdfIn PDF document text
    • http://zulexesovo.epizy.com/3d_video_animation_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/76852425817.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/lilexuwodavep.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/15849177187.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/dedewejafawewabusumi.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/54491899927.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/bahubali_2_movie_320kbps_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/19056042246.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/optc_buster_call_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/42691760748.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/rabuxirun.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/sutepezoleburepe.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/best_gas_pressure_washer_with_honda_engine.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/30900955001.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_off0000ef66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF66 5504 bytes
SHA-256: 5b1a8385e94cf70c1eaf79d0f0ecc228355a082313c426ee4a1a10dbeef7d89a
font_01_sfnt_off000101f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F5 10456 bytes
SHA-256: 44d962b7eb37f59f0a6d63eb54b1a1edba0030472138196bbccfac757dc54b23

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