Malicious PDF — malware analysis report

Static analysis result for SHA-256 4da047db2259aacd…

MALICIOUS

PDF

91.0 KB Created: 2021-03-20 06:59:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0006c220a821f0b7146e7edaec5163f0 SHA-1: 0de2d66dc1d8ba6dbae9ca11daf0f707b45419b0 SHA-256: 4da047db2259aacd2a3a3af0f5d187d44bedb85c66e5f1e1ab380ab323685ebc
134 Risk Score

Malware Insights

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

The PDF document contains multiple heuristics indicating it is a link farm and potentially a phishing lure, with one heuristic specifically flagging it as malicious. The presence of an embedded URL pointing to 'fokemale.ru' and another to 'lnstgramhelpcopyright.com' suggests these are the primary destinations for the malicious activity. The ML classifier and ClamAV detection further support the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://fokemale.ru/123?utm_term=mp4+video+er+apps+for+android PDF link annotation
    • http://lnstgramhelpcopyright.com/use_the_4-7-8_breathing_methodwwnmt.pdfIn PDF document text
    • https://minaraxu.weebly.com/uploads/1/3/4/7/134765114/dosolurifutelev_runogatuxo_vemofiruno_denogiririf.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/Adgjiba/21186113003.pdfIn PDF document text
    • https://nezubarenegutel.weebly.com/uploads/1/3/0/7/130776328/vugatotesimegag.pdfIn PDF document text
    • http://gigezesuzobe.getenjoyment.net/tivosiwulufu.pdfIn PDF document text
    • https://rojuligu.weebly.com/uploads/1/3/0/9/130969709/suzufeji.pdfIn PDF document text
    • https://cdn.sqhk.co/xonepogafix/ifP9VYD/2020_woodturning_symposium.pdfIn PDF document text
    • https://togajakuro.weebly.com/uploads/1/3/1/4/131409127/vukuwetapibusu_fegezowuxojawul.pdfIn PDF document text
    • http://beliyden.xyz/what_was_the_virus_in_v_for_vendettai12s1.pdfIn PDF document text
    • https://cdn.sqhk.co/mitejapeki/aOtmFuK/sobosulekebur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccc47107-4019-464d-8b8a-360ec1405267/hadith_for_kids.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/16287826694.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a838d28-0132-44e6-8210-b30f882bb79b/17754088596.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/kadetax.pdfIn PDF document text
    • http://zedowep.atwebpages.com/kalender_2020_baden_wrttemberg_feiertage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/696cd8b8-b1df-4940-af9a-256772e24613/reviews_scag_liberty_z.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fc27a0d-a136-43e8-ae32-d07943e344be/fe_reference_handbook_10.0.1_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b0f91a5-22ce-4ce3-97af-fdd5740564c2/uniden_trunktracker_3_bct15x.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/samapijit.pdfIn PDF document text
    • http://bajupigirosinaf.atwebpages.com/appalachian_trail_map_pennsylvania.pdfIn PDF document text
    • http://mixezized.myartsonline.com/5567893417.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/37062518961.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/argument_from_sufficient_reason.pdfIn PDF document text
    • http://kulebosux.myartsonline.com/jifuridofevodujiwoturi.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_off0001240f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1240F 5156 bytes
SHA-256: c77ae8c9f4da13a84a57ef7728cb4f3840606c40f1749a4ac8498f70cdbc04d4
font_01_sfnt_off000135c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135C0 12108 bytes
SHA-256: a9af35539a777087119d2e3982e96e89aa8a1bb744580ee08f037b7f8481cd98

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