Malicious PDF — malware analysis report

Static analysis result for SHA-256 e440bb6c7643e74a…

MALICIOUS

PDF

79.2 KB Created: 2021-03-10 05:26:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e3bc33ea419195878a734970b96fd2be SHA-1: 52efaab2309c9f47888713c438f08d7a7484bcab SHA-256: e440bb6c7643e74a5d00dc274ff80458d3c57d6867c2eb4cceeaa7d6e799238e
186 Risk Score

Malware Insights

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

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 0.9995

Heuristics 6

  • 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.
  • 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://ponafet.ru/wix?keyword=juventud+divino+tesoro+analisis PDF link annotation
    • https://cdn.sqhk.co/galemojubemo/CJPvsid/kanto_region_map_pokemon_deluge.pdfIn PDF document text
    • https://cdn.sqhk.co/leperanurosi/Dhigdhf/gerokomanizazivululegubo.pdfIn PDF document text
    • https://cdn.sqhk.co/xaselavub/Kjfjhju/most_runs_in_one_calendar_year.pdfIn PDF document text
    • https://cdn.sqhk.co/felolavap/fRynKZs/zepoxexegofuzixavamiju.pdfIn PDF document text
    • https://cdn.sqhk.co/nilesatu/jSs3DxB/vsco_photo_video_editor_app_store.pdfIn PDF document text
    • https://cdn.sqhk.co/xilasexiki/jhjaChj/tepemipu.pdfIn PDF document text
    • https://cdn.sqhk.co/kufomopinu/hhgfDkp/50369915315.pdfIn PDF document text
    • http://dfahsdfgjsfg.online/casio_g_shock_gd_100_manualsl609.pdfIn PDF document text
    • http://fsfsfd.xyz/kotamasunebetudosirubapo7loez.pdfIn PDF document text
    • https://cdn.sqhk.co/vafegijateno/fhjtQGT/68696816906.pdfIn PDF document text
    • https://cdn.sqhk.co/pugepavofu/cUjficu/86311278974.pdfIn PDF document text
    • https://cdn.sqhk.co/xotabuti/PjgY9gg/clock_face_crossword_puzzle_clue.pdfIn PDF document text
    • http://mir23.xyz/primeros_establecimientos_de_alimentos_y_bebidas_en_nicaragua3bgjq.pdfIn PDF document text
    • http://zojesawusiniw.22web.org/pijazazewoxabefixiza.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/gowupuzokowuxes/wipewiso.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/reverse_phase_high_performance_liquid_chromatography.pdfIn PDF document text
    • http://midekudaxigol.rf.gd/ics_3000_pump_manual.pdfIn PDF document text
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_90903fcfa70f45bebfd2c288e1719930.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/34417999710.pdfIn PDF document text
    • http://jilerixam.epizy.com/vitafu.pdfIn PDF document text
    • https://09235f31-469a-4613-94fc-36d04c1f642a.filesusr.com/ugd/8b6407_5d6a29fbcb0d443bbe93bf42d8c7e0b4.pdf?index=trueIn PDF document text
    • https://b962d5b8-8819-42e3-9ba3-d95e8366760e.filesusr.com/ugd/f51585_fff3220b444243e9ae26680aadadcbef.pdf?index=trueIn 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_off0000e739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE739 2992 bytes
SHA-256: 158da89de25e6d5fa0e80af121bf86c05c2473e7e5b9c71ac046585ecc5bc692
font_01_sfnt_off0000f1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E4 4868 bytes
SHA-256: 16fa1fdea19f74015ac37a00a72002674862b1728983d7db97b8059ec3e81784
font_02_sfnt_off00010281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10281 14504 bytes
SHA-256: 546dfe07f7ba69a9b2acaf011ee7883eefc5f234f9a6fe2d96bf01d75d25247f

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