Malicious PDF — malware analysis report

Static analysis result for SHA-256 3568c25a83320ad0…

MALICIOUS

PDF

74.4 KB Created: 2021-04-29 02:57:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 1c7c5fd0a39900e19d591dc3706443d6 SHA-1: eae4531c83795a1bb3773761a858ef23eb4123b1 SHA-256: 3568c25a83320ad087ada1c7dbbea4ab4f3c242ce1a191661f537246e959985a
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous external URIs, many pointing to disposable domains, suggesting a link farm used for redirection. The document body, though heavily obfuscated, appears to be a lure related to product comparisons, likely intended to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/strik?utm_term=beats+solo+2+vs+studio+3 PDF link annotation
    • https://vabudefun.weebly.com/uploads/1/3/0/7/130775589/9945890.pdfIn PDF document text
    • http://cyberlife.store/22178129800fq4zg.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/ydNqWgd/stickman_archer_fight_unblocked.pdfIn PDF document text
    • http://the-job.ru/20958615897f1j0b.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/lost_books_of_the_bible.pdfIn PDF document text
    • https://gajaxaja.weebly.com/uploads/1/3/2/7/132712369/kalikotupebad_zaxuwozuvanop_siwege_zemarewapego.pdfIn PDF document text
    • http://tibudirowe.mygamesonline.org/kiwar.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/WYIhijh/fallout_board_game_card_sleeves.pdfIn PDF document text
    • http://gitikirazidapi.medianewsonline.com/zofubowumeke.pdfIn PDF document text
    • http://sallely.xyz/sub_zero_refrigerator_632_vacuum_condenserrk5u2.pdfIn PDF document text
    • http://lidzadva.xyz/ap_music_theory_study_guidez41ic.pdfIn PDF document text
    • https://cdn.sqhk.co/resozasevej/fYagh7U/92946528994.pdfIn PDF document text
    • https://cdn.sqhk.co/jutusaxibu/gjfYihD/hitman_3_gameplay_vr.pdfIn PDF document text
    • https://gujodoludota.weebly.com/uploads/1/3/2/6/132681740/26713.pdfIn PDF document text
    • http://construt.site/51593415056l23kb.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/werowibovezoje/7165852347.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/80986117188.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/riwubosi.pdfIn PDF document text
    • http://tokeparab.epizy.com/30881171001.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/95754617813.pdfIn PDF document text
    • http://xejarejunap.rf.gd/emerald_green_arborvitae_care_guide.pdfIn PDF document text
    • http://vonolukover.epizy.com/adobe_audition_1._5_free_setup.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_off0000e84e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84E 5128 bytes
SHA-256: 21a1d3170dc55c1130b1ff842f2edfa0b22d1016ed87e9053b1560a2b5fdbd94
font_01_sfnt_off0000f9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DE 10188 bytes
SHA-256: 0e4c3e4f2f249e93cc9e4ad0ecc72531e035d1266f73bd38980f59ec7e67e16f

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