Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e394a1872c67d82…

MALICIOUS

PDF

80.2 KB Created: 2021-05-13 04:30:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ffa68894051908bc884aff7b8ff3a952 SHA-1: b82cdd7b77fecf9e8cd33e11f7eab548c5389a3b SHA-256: 1e394a1872c67d82560234fe619db28a5b7db7e5e3e2aa0d56d7f9d97a5ea8c2
186 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 0.9997

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 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.
  • 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=modes+of+failure+ductile+fracture PDF link annotation
    • http://mazafaka69pussy.online/ea_koetting_books6mpnk.pdfIn PDF document text
    • http://vandify.com/lotukukuadyrs.pdfIn PDF document text
    • http://devicesprotectionforusers.site/zujajonobuge5pms4.pdfIn PDF document text
    • http://fuxakuzaporelu.iblogger.org/michelle_beatles_ukulele.pdfIn PDF document text
    • http://tublitalia.space/53226841639g8qci.pdfIn PDF document text
    • http://dujivodawalaxu.22web.org/49879128077.pdfIn PDF document text
    • http://dezurifu.iblogger.org/simple_present_wh-_questions_and_statements_worksheets.pdfIn PDF document text
    • http://nutesane.iblogger.org/62490511936.pdfIn PDF document text
    • http://raicen.com/the_game_plan_2007_english_subtitlesyee6m.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/xisakazelelinim/boomer_sooner_sheet_music_for_trumpet.pdfIn PDF document text
    • https://1dfef493-bba3-4db0-89f7-7cef958ceea2.filesusr.com/ugd/3dbeb3_fac465d3c39d4a4fa9caeef5346e544e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/bavimigemedezugij.pdfIn PDF document text
    • http://jitimixilu.epizy.com/77233919554.pdfIn PDF document text
    • https://7835c217-6b95-46a1-915a-76cdebae3fe0.filesusr.com/ugd/debfb4_1b6e19c90cce45448295a086e16a90a0.pdf?index=trueIn PDF document text
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_cc77fa3a4a314e7ba6da768d93a1a2eb.pdf?index=trueIn PDF document text
    • https://9f503c4c-bf14-4dcb-9a7a-68e0e5bb3568.filesusr.com/ugd/8ac1ab_d2cc80e2a2034933b86d4a6668fbd577.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/10481220594.pdfIn PDF document text
    • https://ef5e9b3f-1a8e-4c79-9b60-34b8f8133c96.filesusr.com/ugd/18574e_173dd26a4bf142f3a643face8e460a8b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/league_of_legends_patch_notes_10.6_release_date.pdfIn PDF document text
    • https://eed7fa7e-4f31-4ba6-8269-e73f07ac74c5.filesusr.com/ugd/93374d_4ec9a80ef8944f7d986daee6577b05bc.pdf?index=trueIn PDF document text
    • https://c8f0d892-4c73-447a-841b-b6a48a565a7d.filesusr.com/ugd/928a57_c9dbe41f0c4d4bd68b2e4ea3ca2b10c3.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_off0000fb92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB92 5020 bytes
SHA-256: 9d683c828785cae26e3c6bae66c42eb8604af64a26305bffca64877f3731887a
font_01_sfnt_off00010cbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBE 11388 bytes
SHA-256: 03fed4b38527c0076526273cbf741e7ab5724ceb5b6686300ec3bbb88b9fbed7

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