Malicious PDF — malware analysis report

Static analysis result for SHA-256 440b5a3b9291e3a8…

MALICIOUS

PDF

92.7 KB Created: 2021-05-23 04:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60929d9f7008ca7065094d1442daee0f SHA-1: 7511b9945640a806b8199c3c08628c81749f4b09 SHA-256: 440b5a3b9291e3a8dd25488006fe21dfa2a28842f1ef319cd20667f1396cbe40
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. One of the primary external links, 'https://pelibifir.ru/strik?utm_term=james+joyce+ulysses+quotes+love', is flagged as suspicious and likely leads to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/strik?utm_term=james+joyce+ulysses+quotes+love
    • https://xizejaselaz.weebly.com/uploads/1/3/4/3/134357450/wubidefuvo.pdf
    • https://xebolefijepipol.weebly.com/uploads/1/3/0/7/130739937/f848c88d00e2a1.pdf
    • https://torevuke.weebly.com/uploads/1/3/4/3/134378254/gigumisigujamile.pdf
    • https://madudezogimune.weebly.com/uploads/1/3/4/3/134326665/wolufulafa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/bulujono/53641725630.pdf
    • https://uploads.strikinglycdn.com/files/df8b3ab0-cb4d-4544-b2a9-2a8352ce0761/xelezeforidudulomuturuva.pdf
    • https://s3.amazonaws.com/jefazaxal/writing_worksheets_for_2nd_grade_printable_free.pdf
    • https://uploads.strikinglycdn.com/files/08e6c1ee-aef6-45e3-9b7c-d00cb88b5f2c/edvard_grieg_peer_gynt_suite_1_and_2.pdf
    • https://uploads.strikinglycdn.com/files/f513074f-f4c7-4ca2-994b-ae155df36908/lefetimivopozerikewenaxif.pdf
    • https://uploads.strikinglycdn.com/files/9d3c0a86-0370-41bb-a1f1-2eb427ad161e/john_deere_tractor_mechanic_near_me.pdf
    • https://uploads.strikinglycdn.com/files/05d60a92-eed4-4f08-bc7c-06b6fbf99ab3/best_target_rifle_for_200_yards.pdf
    • https://s3.amazonaws.com/jajuzasalikirut/57928084933.pdf
    • https://uploads.strikinglycdn.com/files/ab800ad8-b301-45b9-84d7-92132e118dc6/wd_my_cloud_ex4_manual.pdf
    • https://uploads.strikinglycdn.com/files/c4aff709-a1ec-4f27-b6b4-b55143b1b230/88198910308.pdf
    • https://uploads.strikinglycdn.com/files/ed3c044d-94bc-4c33-bcc3-328ba4009bc2/jukowibudiwezugug.pdf
    • https://uploads.strikinglycdn.com/files/772c3082-1efd-48e3-a457-266a3b4b774e/venezuela_forma_de_gobierno_actual.pdf
    • https://uploads.strikinglycdn.com/files/d2897b3f-c5d3-44dd-9be8-6a154c998577/bowalobuwodulusatumeni.pdf
    • https://uploads.strikinglycdn.com/files/663fffbb-f62a-4d76-9146-b7267579df5a/what_a_company_owes.pdf
    • https://uploads.strikinglycdn.com/files/a7095a5d-166d-4ebf-a240-89b3286468c6/nozidifux.pdf
    • https://uploads.strikinglycdn.com/files/137d4789-94ed-4e71-a401-4860f7a2a5cd/how_to_make_swarm_traps.pdf
    • https://uploads.strikinglycdn.com/files/d5e1b884-3aa2-4df8-b235-c40165e71536/behind_closed_doors_movie_2020_cast.pdf
    • https://uploads.strikinglycdn.com/files/5c0ae943-2c49-4bd0-9ad5-5491db0b85a4/rixab.pdf
    • https://uploads.strikinglycdn.com/files/7cb77248-06fd-48bb-8f08-90dc589d5d53/petidedobizopafov.pdf
    • https://s3.amazonaws.com/nijudow/figurative_language_exercise_19_answers.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fca6.bin
44706fe3d4024c7aea5ada29ac0e4e1d9f9f0063bd535fe643b6145033b4caf9
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA6 4932 bytes
font_01_sfnt_off00010d8d.bin
92673aa6806131cb89ce683bbd6ddcfd013cb5707359025eb492006322f6cfa2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D8D 3224 bytes
font_02_sfnt_off00011ab6.bin
344c2fc34b92ad44b157d49085851ff650ba4b6a6acb7e16576fa850f85c9035
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB6 11024 bytes
font_03_sfnt_off00014071.bin
334a632046566dba1e13aa2ad28522ffc4701ff005b1d667d8ded0e84145bcf3
pdf-font-stream PDF embedded font (sfnt) at offset 0x14071 16304 bytes
font_04_sfnt_off000155e7.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x155E7 4324 bytes