Malicious PDF — malware analysis report

Static analysis result for SHA-256 97ba79bfa9bad7f2…

MALICIOUS

PDF

79.7 KB Created: 2021-04-02 07:29:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a86905c6b6a12ce5474a4ba58da2da96 SHA-1: d00882bdfcdfffbe94832c84ed1e8b08d6521b2f SHA-256: 97ba79bfa9bad7f2206552f7bd7d466855505e0d799fbec0ecb05bffb594224f
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on disposable domains, indicating a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://nipisod.ru/strik?utm_term=ikea+catalogue+2020+request PDF link annotation
    • https://cdn.sqhk.co/kitolitik/ZnAck6u/como_se_dice_virosis_en_ingles_yo.pdfIn PDF document text
    • https://dobidikomopal.weebly.com/uploads/1/3/5/3/135302797/setazog.pdfIn PDF document text
    • https://jematujevuzonip.weebly.com/uploads/1/3/4/2/134235480/memabe.pdfIn PDF document text
    • http://cashtanks.fun/asphalt_6_adrenaline_androidgamegratisan70rbf.pdfIn PDF document text
    • http://trujillostacoshop.com/66447733573p3xqg.pdfIn PDF document text
    • http://lajibodomemebev.66ghz.com/bleacher_report_fantasy_week_3.pdfIn PDF document text
    • http://saluzoz.iblogger.org/what_is_flat_belly_diet_plan.pdfIn PDF document text
    • https://boxotegiperofog.weebly.com/uploads/1/3/1/3/131398000/vavubedogufu_tusiniduv_zunale.pdfIn PDF document text
    • http://arbitestpark.xyz/homedics_digital_scale_instructions9gpxg.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/sia6pgf/star_wars_live_wallpaper_iphone_8_plus.pdfIn PDF document text
    • https://cdn.sqhk.co/lisesemafo/7jhJgjL/zabudimusakitekotuxuluxij.pdfIn PDF document text
    • http://keepqifi.space/caracteristicas_de_un_algoritmo_definidojilsi.pdfIn PDF document text
    • https://laratenin.weebly.com/uploads/1/3/2/8/132816160/matuxal.pdfIn PDF document text
    • http://logvoz.ru/142127190415cgje.pdfIn PDF document text
    • https://cdn.sqhk.co/sategexarom/Ywggz20/east_west_play_free.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/ji7ZgcV/among_us_stickers_full_hacked_version.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/h3Cyjhb/puwar.pdfIn PDF document text
    • https://cdn.sqhk.co/riwifesineji/bIjyAyx/lost_in_harmony_mod_apk_2._2._2.pdfIn PDF document text
    • https://cdn.sqhk.co/wofikubid/chIbic2/minigun_fortnite_song.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://34e2f0dc-0077-42bd-a047-efa2502e92af.filesusr.com/ugd/8a05ec_b4b8f208b46e47a79028eee81291afd7.pdf?index=trueIn PDF document text
    • http://fomariwidodazum.rf.gd/como_baixar_editor.pdfIn PDF document text
    • https://1ce8651a-bfbb-4b9a-b1bf-24b3b574775a.filesusr.com/ugd/ac72e0_0a82183b664b47b88b1687b295ec868e.pdf?index=trueIn PDF document text
    • https://1ec9b6e7-17eb-4e1e-a994-ba5ce4cbdb7c.filesusr.com/ugd/d4a9d6_8d57234406954ef09b5714fdab69e2ea.pdf?index=trueIn PDF document text
    • http://zisafaziga.epizy.com/lodubesinaserobawaxeregu.pdfIn PDF document text
    • https://0c3b2bb2-3ac9-4e0e-a0b2-530a831cdf0d.filesusr.com/ugd/23193f_59ffb47aec9a4d679594d9c0933cd981.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E4 5368 bytes
SHA-256: f00005a2519693704009b85d2fe929d7e0bf8797c0e6779171fec2d60c1795c7
font_01_sfnt_off00010a36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A36 11588 bytes
SHA-256: f850bf52c40d920c48eedbb5c7147a876743055c4a1b4bb99a718511c55b6692