Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad4def44f7585814…

MALICIOUS

PDF

72.8 KB Created: 2021-02-18 13:04:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1b00ae3833ee1d5e1c46c00568b3e0d1 SHA-1: 134dfdd1efbffbdd76501e29f38ae3be92f83f74 SHA-256: ad4def44f75858144c3e25de5dc5d4bcf65ba0fcdb8e5ac295dad64eb8f992ae
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The PDF contains a large number of external links, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, 'https://seumenha.ru/wix?keyword=easy+way+to+get+strange+coins', is likely part of the malicious infrastructure.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=easy+way+to+get+strange+coins PDF link annotation
    • https://cdn.sqhk.co/wofetewa/hia0jit/superbiker_mettet_2019_results.pdfIn PDF document text
    • https://cdn.sqhk.co/nejajevafode/z4ZGibd/the_bubble_shooter_story_level_164.pdfIn PDF document text
    • https://cdn.sqhk.co/benanejufa/jcgchcI/70684047487.pdfIn PDF document text
    • https://cdn.sqhk.co/galemojubemo/EgDRhid/free_trap_rap_instrumental_mp3_download.pdfIn PDF document text
    • http://ragixanomus.iblogger.org/clarinet_sonata_saint_saens_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/sobupepokor/bpjg0TO/to-_do_list_items_crossword_clue.pdfIn PDF document text
    • http://zujazufomok.iblogger.org/glioblastoma_multiforme_nuove_cure.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/5w8EhjE/85242353242.pdfIn PDF document text
    • https://vanizubifimid.weebly.com/uploads/1/3/0/8/130874516/nuvixejikoxixin_savizaxewupe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/3073308457.pdfIn PDF document text
    • http://xewenofos.epizy.com/85886703867.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/rafatifadin.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/alberta_blue_cross_health_benefits_claim_form.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/rozalorupojabibarumumub.pdfIn PDF document text
    • http://renenubulasuf.rf.gd/jurassic_world_the_game_apk_obb.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/64549814859.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/movies_maza_bollywood_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/conversations_with_god_best_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/center_align_text_in_toolbar_android.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/breitling_a25362_manual.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_off0000e044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE044 5084 bytes
SHA-256: f0a9f8d500183b1e187762d5a783157d138771df36c0a393d5bdf0cd410ff90e
font_01_sfnt_off0000f1c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C1 10644 bytes
SHA-256: b4fdcfcfa9b1f6fc0020e2293fd7a407a5f1417f041c6189631f6f49014579db

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