Malicious PDF — malware analysis report

Static analysis result for SHA-256 997fea2d5017e442…

MALICIOUS

PDF

72.7 KB Created: 2021-02-27 17:44:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7c0d245857dcf5b0d5785aaf37b83f3a SHA-1: 7df16506619ac80a49065b085a8da2b3b4c669f6 SHA-256: 997fea2d5017e4421f23b9fc9a74b52901466bae59903edb34d4d510c24fc7be
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/award?keyword=what+is+news+article+writing PDF link annotation
    • https://lapolepep.weebly.com/uploads/1/3/1/4/131406498/guxenuduwo.pdfIn PDF document text
    • https://cdn.sqhk.co/gusisitixinu/jbFih6X/lockdown_brawl_battle_royale_card_duel_arena_ccgs.pdfIn PDF document text
    • http://topcabinets.xyz/arteriovenous_malformation_embolizationqqinx.pdfIn PDF document text
    • http://a1metromovers.com/auction_houses_appleton_wisconsinu47ix.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/eMjfZsp/97173244169.pdfIn PDF document text
    • https://tizirabavapamob.weebly.com/uploads/1/3/1/4/131453045/daxopegikuzuke_dunuximejakevo.pdfIn PDF document text
    • http://xomunuxeju.sportsontheweb.net/3_point_perspective_drawing_step_by_step.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/fodotobakovidejokida.pdfIn PDF document text
    • http://rameautbxy.space/is_outside_an_adverb_or_an_adjectivewqs8a.pdfIn PDF document text
    • http://gordei2d.com/55048309453sls5s.pdfIn PDF document text
    • https://cdn.sqhk.co/wosepimi/6jfA4gg/fantasy_football_2020_coronavirus.pdfIn PDF document text
    • https://xakojulowijax.weebly.com/uploads/1/3/4/6/134618271/4803202.pdfIn PDF document text
    • https://cdn.sqhk.co/pinufizugal/ibJfoiO/arknights_warfarin_age.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/igzhgPo/history_of_south_african_maskandi_artists.pdfIn PDF document text
    • https://gitufigekuxos.weebly.com/uploads/1/3/4/6/134634758/riwipofewulif_keroxirovas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://resilasijajatil.myartsonline.com/on_the_road_again_chords_grateful_dead.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_off0000e257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE257 5168 bytes
SHA-256: c48a86dec2d588a18e6231933606148dff9a260afe43c3447ae58fd4ce958a4f
font_01_sfnt_off0000f3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FC 10040 bytes
SHA-256: b7a3393741eaa5ddb1a16ed577cdb9d1db51361541f562e3d5228e12064c15a1

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