Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cec643c650ce912…

MALICIOUS

PDF

77.3 KB Created: 2021-04-30 23:13:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 90a1a3fb8c4bf3e5f9505617b82a3fbf SHA-1: 85119f940d816a029be1577fa2440f8bcfae5007 SHA-256: 1cec643c650ce9123474411549298a8f87af53c7f50c6cb138a82fdf7dc012f3
226 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. It uses a password-protected-archive lure. 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 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://dugedepap.ru/strik?utm_term=cradlepoint+ibr600c+factory+reset PDF link annotation
    • http://selectgetc.top/24219030774dvl3c.pdfIn PDF document text
    • https://cdn.sqhk.co/juzosugun/yiaPjct/16799205784.pdfIn PDF document text
    • https://cdn.sqhk.co/bulunazi/dggIEE7/best_image_collage_maker_app.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/dD1CKgd/67575395647.pdfIn PDF document text
    • https://dudosixe.weebly.com/uploads/1/3/4/3/134323580/rovoxoros.pdfIn PDF document text
    • http://tezafowula.iblogger.org/77977145907.pdfIn PDF document text
    • https://fobulosarurek.weebly.com/uploads/1/3/3/9/133997379/1780295.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/jitHeUT/30511198973.pdfIn PDF document text
    • https://nowuvufeguxebib.weebly.com/uploads/1/3/2/8/132814980/rudabubexegoz_sofavogu_nikejamuf_ziwizimiwom.pdfIn PDF document text
    • http://bestsaleshopin.xyz/abide_in_the_wind_manga85ef8.pdfIn PDF document text
    • http://idealicacolumbia.site/the_history_of_middle_earth_complete_setda9lm.pdfIn PDF document text
    • https://kazirevuteguzug.weebly.com/uploads/1/3/2/6/132681824/7c53d13fae19.pdfIn PDF document text
    • https://cdn.sqhk.co/duwenaxiseve/kgiU12C/34842224564.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_aecce4aa9db84dd1bd9ec09f4a476154.pdf?index=trueIn PDF document text
    • https://f72e0e13-a873-49c5-9cb5-3c2848b8c5b2.filesusr.com/ugd/f8ba4b_6f791288042646bfa89865304ed3513c.pdf?index=trueIn PDF document text
    • https://0aed7b51-d02b-4864-a6bb-b478bb809667.filesusr.com/ugd/fbdaab_368ef5c5e3934092a823c213be710bc0.pdf?index=trueIn PDF document text
    • http://titegerekarirov.rf.gd/97872804194.pdfIn PDF document text
    • http://vukimikopid.epizy.com/12th_maths_formulas_free_download.pdfIn PDF document text
    • https://b32521b7-32ca-447e-9967-d27d0dce683d.filesusr.com/ugd/800b88_2e693fd40d764d22bbd61d505a75e6ea.pdf?index=trueIn PDF document text
    • https://0d3c4653-ec4b-4b04-9c20-59e348ba858e.filesusr.com/ugd/62200f_788206768b57495f8ac5072fce2d9ed2.pdf?index=trueIn PDF document text
    • https://4d75d3c9-3a4d-4df6-84ab-e48b83d723e5.filesusr.com/ugd/cdb50c_e52a725795b348039285b2c5c9db969e.pdf?index=trueIn PDF document text
    • https://a519209a-2b0a-481f-9fe9-460c873bdc80.filesusr.com/ugd/270e53_d1d1b185313440129ba7a3944622fdee.pdf?index=trueIn PDF document text
    • http://wasaxotudulolo.epizy.com/wef_inclusive_growth_and_development_report_2018.pdfIn PDF document text
    • https://a21f0d7d-5fe0-4a99-a381-3b18266e0880.filesusr.com/ugd/6c313a_60d3d263474a44e3b18e2b7b49e887ab.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_off0000f091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF091 5592 bytes
SHA-256: 8ed35788c53bac38620f65d3361e2dc113decd9bbc7e9821662fb7b2f04d9b6d
font_01_sfnt_off0001039d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039D 10580 bytes
SHA-256: d9fade3701b2a038818817ddb0195c943f63d488eb3043bc864c2d200d85e5b5