Malicious PDF — malware analysis report

Static analysis result for SHA-256 f989c5fb10a60c34…

MALICIOUS

PDF

82.9 KB Created: 2021-04-03 14:26:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 451a4dd031937ffb338461b6f6a5a4aa SHA-1: b069c5b6cc487d1cc30741b6cb358ffd2732fbed SHA-256: f989c5fb10a60c34730f4345d8d0220ec339894467e3efac6f9a66af1c5d4c36
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 0.9992

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://mezovuduw.ru/award?keyword=agricoltura+biodinamica+pdf PDF link annotation
    • https://cdn.sqhk.co/mujetujojen/iagigih/anwar_awlaki_lectures_free.pdfIn PDF document text
    • https://cdn.sqhk.co/tawibonikigo/giBicre/mini_retro_classic_game_console_review.pdfIn PDF document text
    • https://cdn.sqhk.co/luxixumogez/ejhep2V/75625323737.pdfIn PDF document text
    • https://cdn.sqhk.co/vozaxodep/eVngiez/83724578542.pdfIn PDF document text
    • http://tonevagewalilu.medianewsonline.com/caballo_de_troya_4_descargar.pdfIn PDF document text
    • https://cdn.sqhk.co/gasajolop/ibUjihf/juniromirapavu.pdfIn PDF document text
    • https://cdn.sqhk.co/sirijunubi/iejfjew/faditovuduxetigikixukoze.pdfIn PDF document text
    • https://cdn.sqhk.co/verikiweneza/hhhKig9/8_10_12_block_puzzle_solution.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/09iajdm/debigupotekewa.pdfIn PDF document text
    • https://cdn.sqhk.co/giwitosak/v17phjj/sales.pdfIn PDF document text
    • https://cdn.sqhk.co/vadavenaw/Ihj9hjS/30546949370.pdfIn PDF document text
    • https://cdn.sqhk.co/zopizote/tgj3Xja/zowizukofipobeka.pdfIn PDF document text
    • https://cdn.sqhk.co/rosojolude/igjjtij/79545199403.pdfIn PDF document text
    • http://tanolugulutewu.medianewsonline.com/lemeb.pdfIn PDF document text
    • https://cdn.sqhk.co/gasubapo/egijfB7/off_season_field_hockey_training_program.pdfIn PDF document text
    • https://cdn.sqhk.co/wazikunal/hd02jW8/bounce_shoes_90s.pdfIn PDF document text
    • https://cdn.sqhk.co/liwifetil/iihyOih/xomet.pdfIn PDF document text
    • https://cdn.sqhk.co/rokijatu/hjcG4ia/r_type_2_amiga_rom.pdfIn PDF document text
    • http://juraxoxodas.scienceontheweb.net/lukime.pdfIn PDF document text
    • http://memiwuv.mygamesonline.org/yoga_poses_to_help_with_constipation_when_pregnant.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://futebowa.atwebpages.com/vovimobuk.pdfIn PDF document text
    • http://kofujuluzode.epizy.com/paladin_warlock_guide_5e.pdfIn PDF document text
    • http://jizokiw.rf.gd/vewagano.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DB 5192 bytes
SHA-256: 9032f5ee093dcfde6027d31cfc5f9448f21d9e677f547340a2250bfaae2b91fc
font_01_sfnt_off0001095d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095D 11412 bytes
SHA-256: 4beb3a0972ecc7477ea5151e99b3aeaac2a7f1671352bca6041d4f7a589c320b
font_02_sfnt_off00012e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E76 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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