Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a9dcbb31f285940…

MALICIOUS

PDF

75.5 KB Created: 2021-03-18 00:27:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7db1d3052e4dd0f515d83021a88c159b SHA-1: 206fc0657881692e03dbfb73e491b91eae484aa1 SHA-256: 9a9dcbb31f285940cb87b6bdac212d302466c4e54210ce092e834da7003931d6
156 Risk Score

Malware Insights

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

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 0.9991

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://xezojetit.ru/award?keyword=panasonic+aw+ue70+spec+pdf PDF link annotation
    • http://paypallsecurity.com/2615244015988x30.pdfIn PDF document text
    • http://digitalmicroteter.xyz/94371550554r9o3z.pdfIn PDF document text
    • http://hookup153.online/61957385904xll94.pdfIn PDF document text
    • http://1eyvgo.xyz/84957650866o2h16.pdfIn PDF document text
    • http://makeyourself.xyz/240644612722e13z.pdfIn PDF document text
    • http://weporobedamebu.22web.org/zotevonizuxo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/konix.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/convert_audio_to_midi_logic_pro.pdfIn PDF document text
    • http://nawevoted.epizy.com/30971615116.pdfIn PDF document text
    • https://5a4e7950-e122-4b3c-9cf7-894e7f5b1216.filesusr.com/ugd/76aeb6_4c017dd163b945dea480202b50c23bc3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/como_proteger_mi_red_wifi.pdfIn PDF document text
    • http://wufasimateli.epizy.com/bujonanesime.pdfIn PDF document text
    • http://rolexewosuvasu.epizy.com/30632246956.pdfIn PDF document text
    • https://6f81cef9-66a2-447d-9e1d-4c0427ef15c5.filesusr.com/ugd/4d935e_c7b2ca417ad84e7596e3bb7813ef543a.pdf?index=trueIn PDF document text
    • http://zafovitunopejus.epizy.com/wwe_bleacher_report_backlash_grades.pdfIn PDF document text
    • https://2ea9429b-0332-4ee6-bb75-ab9535b56c99.filesusr.com/ugd/e2f7e1_af2bf73c4823437695139502582fae92.pdf?index=trueIn PDF document text
    • https://0ea28b16-58c2-472d-b6be-3e97fe9b7bb6.filesusr.com/ugd/696b8a_cd70997a92eb44568a64c7da535aa1c6.pdf?index=trueIn PDF document text
    • http://nufaviziziji.epizy.com/guvomefota.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/top_best_offline_games_for_android_2018.pdfIn PDF document text
    • http://sixosotonipo.epizy.com/nursing_medical_terminology_list.pdfIn PDF document text
    • http://xevemifura.rf.gd/electrolyte_repletion_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/meludixomenafokul.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/97914491693.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/xujemudo.pdfIn PDF document text
    • https://8ed62699-7d02-4439-b935-4286882ef7d4.filesusr.com/ugd/229b11_b487f95fb0c6484ab488e9373b931a73.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_off0000e849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE849 5336 bytes
SHA-256: 43f0531c303b9bc36e9be2f335ecf51f6598a942d39d0422fed2a17a956a9d7a
font_01_sfnt_off0000faa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA4 11032 bytes
SHA-256: 11954071068ce288b8155d13a330c1c367fc825049c93eefeb36a6f277c5d678

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