Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7d012cdf8ac8e79…

MALICIOUS

PDF

90.1 KB Created: 2021-03-17 07:17:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fd96490ed00ae0cc243028311fab7992 SHA-1: 1cacc4fe6ac5b16eecf7c5408c5157cc7141203f SHA-256: a7d012cdf8ac8e79faccc04d3cc9a6b69e484c0a7e296b02000cb4d0416ef365
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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 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://dafemum.ru/strik?utm_term=samsung+gear+circle+manual+espa%25C3%25B1ol PDF link annotation
    • https://laludigulasi.weebly.com/uploads/1/3/1/4/131437637/rinidakutepifimev.pdfIn PDF document text
    • https://rajevolid.weebly.com/uploads/1/3/0/8/130813967/nesonejegapofi.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/qklgfri/i_can_paint_game_free.pdfIn PDF document text
    • http://xokodiraki.22web.org/jaybird_x4_wont_turn_on.pdfIn PDF document text
    • http://mazanatur.space/gout_cookbooksnd3m.pdfIn PDF document text
    • http://smartycredit.info/gap_factory_baby_snowsuit79kly.pdfIn PDF document text
    • http://nubolutlion.xyz/electric_potential_difference_between_two_plateseo03t.pdfIn PDF document text
    • https://cdn.sqhk.co/farafakilof/gegcGge/deal_finder_cape_girardeau.pdfIn PDF document text
    • http://reduslimer.website/dewalt_circular_saw_edge_guide82x7t.pdfIn PDF document text
    • http://xuxazefovudiwe.iblogger.org/bowed_psaltery_sheet_music_free.pdfIn PDF document text
    • http://ziwegiwe.iblogger.org/13261927335.pdfIn PDF document text
    • https://nedixizudunosil.weebly.com/uploads/1/3/1/4/131483200/tatep.pdfIn PDF document text
    • http://trastqort.online/mobile_call_ringtone_free2216a.pdfIn PDF document text
    • https://cdn.sqhk.co/morureju/25gchfx/storm_io_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/givefugonuw/gieYD86/magento_2_override_email_template_in_module.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bogukap.rf.gd/the_power_of_one_book_rating.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/lokinudiwogavivifa.pdfIn PDF document text
    • http://rerorexemebiliv.epizy.com/dotanepadidifopavafuvis.pdfIn PDF document text
    • http://vuropomap.epizy.com/56488190757.pdfIn PDF document text
    • http://jazupizewatabal.epizy.com/41786974213.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/lutanoponikuxatotup.pdfIn PDF document text
    • http://vudolazer.rf.gd/can_you_just_buy_premiere_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/39656005792.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/mepewegorotewaxidaxago.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/cnc_drilling_machine.pdfIn PDF document text
    • http://zilaxeputeso.epizy.com/angular_formarrayname_example.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_off0001203b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1203B 5568 bytes
SHA-256: 0e35740765904eda75d2636d9e3785dd13032ced2b7869c534ea42267242f846
font_01_sfnt_off000132d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D0 11672 bytes
SHA-256: e7e04ae009ee739c76b13aa9e4ada12091f4112ba802a498d5466b93e0b6803a

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