Malicious PDF — malware analysis report

Static analysis result for SHA-256 56550abe23f031e0…

MALICIOUS

PDF

86.9 KB Created: 2021-02-25 18:34:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 1b9290aa88405aba821c6d77a58b02f2 SHA-1: db8f1e7be79827960fb01958ec5c9358fbcf2676 SHA-256: 56550abe23f031e04f7e33ec09908559d02c4e4e5bd5ad02daa93121ac470934
166 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains multiple heuristics indicating it's a link farm and uses invisible links to suspicious domains, such as http://managerprogram.live/block_story_multiplayer_mod0wsz9.pdf. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of numerous links to potentially malicious sites suggests a phishing or malware distribution attempt.

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://druttle.ru/strik?utm_term=universal+audio+apollo+twin+duo+mk1+vs+mk2 PDF link annotation
    • http://stassikorskyi.com/60_seconds_atomic_adventure_download_apk_androidbvrco.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458856/normal_5ffa782246124.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/8rUxjau/download_stick_soccer_2_mod_apk_android_1.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/81887126279.pdfIn PDF document text
    • http://managerprogram.live/block_story_multiplayer_mod0wsz9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479235/normal_5fce0748e1575.pdfIn PDF document text
    • https://remejatezikame.weebly.com/uploads/1/3/1/0/131070309/30ca3f28cc47.pdfIn PDF document text
    • http://boxberry-24.cc/is_diastasis_recti_bad_during_pregnancypzv2q.pdfIn PDF document text
    • http://golixudib.mypressonline.com/miligudojivapozodiser.pdfIn PDF document text
    • https://viwosakizipisot.weebly.com/uploads/1/3/5/3/135321869/tofemowiwixuda.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/toyota_camry_se_2018_tires.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412778/normal_5fcd401a86537.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378151/normal_602654eb987ca.pdfIn PDF document text
    • http://osmosiotzs.fun/zujemetadowobozirufokajei9mgx.pdfIn PDF document text
    • https://cdn.sqhk.co/dodamewope/icjcgef/basizunizofatog.pdfIn PDF document text
    • http://astropsychology.site/ankhiyon_ke_jharokhon_se_video_songnhxnn.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
    • https://s3.amazonaws.com/tesotiwapax/kevimezi.pdfIn PDF document text
    • http://jatoxat.atwebpages.com/pedevudazilotisu.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/lanerukalosagegidajikedil.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_off00010785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10785 5376 bytes
SHA-256: 296b703fdb236bf91993257df02d085ad709b6e927794e1520822fc940c0e45a
font_01_sfnt_off000119cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119CD 11240 bytes
SHA-256: d7c0b3f433aa7b94ac7b866c87c8021581b24081dcb6c4d98c50b3f6bae0bf87
font_02_sfnt_off00014018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14018 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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