Malicious PDF — malware analysis report

Static analysis result for SHA-256 3182c61ee063537d…

MALICIOUS

PDF

69.7 KB Created: 2021-03-21 05:02:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 43aa99a5c8a643936da054135368e0ee SHA-1: 946ba60c17ba241fb5da659641a92baea7cd1095 SHA-256: 3182c61ee063537df750d4150b653d171dfa4d63412ff083269be7ae9b961db9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/123?utm_term=sap+mm+inbound+delivery+report PDF link annotation
    • http://wijofotezopadik.medianewsonline.com/percy_jackson_battle_of_the_labyrinth_movie_release_date.pdfIn PDF document text
    • http://wwwbcpzonasegura-viabcp.com/40942790019o7jg3.pdfIn PDF document text
    • http://mujododaziwato.scienceontheweb.net/que_diferencia_hay_entre_purinas_y_pirimidinas.pdfIn PDF document text
    • https://cdn.sqhk.co/komiburufezo/ha8Icgc/94540683409.pdfIn PDF document text
    • https://cdn.sqhk.co/gonuromabime/jhheKE3/try_not_to_laugh_challenge_3_collins_key.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/fggNddn/the_lightning_thief_audiobook_chapter_3.pdfIn PDF document text
    • http://wirelessinfo.ru/original_american_cookery_book860tt.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/harry_potter_8_release_date.pdfIn PDF document text
    • https://cdn.sqhk.co/tatogevi/EMjipx8/screen_recorder_video_recorder_game_recorder_pro_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/niramojiga/JMn8ihP/38387849533.pdfIn PDF document text
    • http://biolinkus.me/join_active_groups_unlimited_2020jen9g.pdfIn PDF document text
    • http://lidlid.xyz/tizimazetobizefks7nv.pdfIn PDF document text
    • https://cdn.sqhk.co/weretesa/Sgdf1w5/54608372291.pdfIn PDF document text
    • https://cdn.sqhk.co/visipapafef/iAihjib/how_to_use_edible_wafer_paper_sheets.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusetoteji/ighbhhI/cold_war_commander_forum.pdfIn PDF document text
    • https://cdn.sqhk.co/kadefowuvun/Mhihc2K/bbmp_property_tax_paid_receipt.pdfIn PDF document text
    • https://cdn.sqhk.co/ribobujir/gehijgh/tunozobuguvuweduluze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuvuzonixo.onlinewebshop.net/fozupiwoxosiwutalis.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/noxikadopojepati.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/all_of_me_violin_piano_sheet_music.pdfIn PDF document text
    • http://suwuriru.onlinewebshop.net/biomateriales_polimricos.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E5 5332 bytes
SHA-256: 11bd146e1e28d909797ee7805a78c1b6cffa169896530e21fc9dea0bfc4f945f
font_01_sfnt_off0000e5f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F7 10436 bytes
SHA-256: 4fe7fe71d52e25999e88508a266d4a9224369345caba38bd3f2b5194e5a82e70

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