Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d54f813fb621df1…

MALICIOUS

PDF

75.5 KB Created: 2021-02-19 14:46:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f16cf83d161892f4461e133f1cbf8c31 SHA-1: 187b31215ce09e4c0549bbbd21ac0d90c6a9303e SHA-256: 0d54f813fb621df103331f1bad79d0d6dc7b14016f214dbadf5ee4b974753516
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The PDF_SEO_LINK_FARM heuristic indicates it contains a large number of external links, with the first identified link pointing to a PDF hosted on AWS. The ML classifier also strongly indicated maliciousness. The primary attack pattern appears to be a link farm designed to direct users to potentially malicious content hosted externally.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://seumenha.ru/123?utm_term=magic+mouse+2+ipados+13.4+gestures PDF link annotation
    • https://tafugamukizigip.weebly.com/uploads/1/3/0/7/130775106/7984810.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/Wggbjhk/bubble_shooter_christmas_wheel.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/jcfhafx/princess_bubble_shooter.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/Fgchagi/las_vegas_casino_games.pdfIn PDF document text
    • https://cdn.sqhk.co/luwosera/hgekU7O/ocean_survival_3d_2_android_oyun_club.pdfIn PDF document text
    • https://xoverepidagagit.weebly.com/uploads/1/3/4/4/134469055/4417384.pdfIn PDF document text
    • https://cdn.sqhk.co/fogibadeku/8Egf1jh/valiant_mobile_banking.pdfIn PDF document text
    • https://cdn.sqhk.co/livukigelo/ggbvih5/44080764743.pdfIn PDF document text
    • https://vefamomapebimid.weebly.com/uploads/1/3/1/4/131406391/gawazepelawavel-vivuvajefazij-wigizumudepezuv.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/sTIjfIu/pop_rock_80s_music_radio_online.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/wusigipufuvowix/nedekurokaworapom.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/morula_blastula_gastrula.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/rusubasubonumarekex.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/antivirus_free_for_laptop_windows_8.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/qbcc_referee_report_form.pdfIn PDF document text
    • http://jekopebajazitat.rf.gd/witurazegimojegukavepok.pdfIn PDF document text
    • http://fikirifulok.epizy.com/forbes_travel_guide_london_office.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/toxizasabozuxivebak.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/bodovafawekezo.pdfIn PDF document text
    • http://povutov.epizy.com/wijozaniwuzonefukafolen.pdfIn PDF document text
    • http://pijularof.epizy.com/xujitekofovorisaxojaludo.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_off0000dcc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC2 5608 bytes
SHA-256: 875ec37237e668859e80cd450e641f46e2cb5bab693f2e03af8928d764195e3c
font_01_sfnt_off0000eff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF5 10208 bytes
SHA-256: 116dcd964d8d1376e6fe2b28b21feb903851fd79dd59fac2540275aeaaa93450
font_02_sfnt_off000112ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112AC 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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