Malicious PDF — malware analysis report

Static analysis result for SHA-256 e15a86882183c5d2…

MALICIOUS

PDF

77.5 KB Created: 2021-03-29 02:50:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b788d5da6e4682f65cbdda1962e08d30 SHA-1: 2dbc21a57a643d6a2eb5904ca3a329d76a1efaf4 SHA-256: e15a86882183c5d2bc32808f636ddd1fc01693b47d7e35824c95388d8309ca82
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on free web hosting services and appear to be part of a link farm. The primary malicious URL identified is 'https://lozipotod.ru/123?utm_term=alicia+keys+2019+grammy+performance', which is likely intended to host phishing content or malware. The presence of a PDF link farm heuristic and ClamAV detection strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/123?utm_term=alicia+keys+2019+grammy+performance
    • https://todijaxazifaro.weebly.com/uploads/1/3/4/3/134342800/1418677.pdf
    • https://jakugogafezokev.weebly.com/uploads/1/3/1/4/131437362/bixem-zagal-dojonanapoxiviz.pdf
    • http://lnstagram-verifedbadge.com/218900657ov3sr.pdf
    • http://razvivatel.blog/trail_climb_mod_apk_revdlata1p.pdf
    • https://cdn.sqhk.co/nopusixinid/oLu1QCm/12062124668.pdf
    • http://g2am2e.xyz/tazokumadosepv3.pdf
    • https://cdn.sqhk.co/kenipafitu/87X5hbv/newimewarelesox.pdf
    • https://cdn.sqhk.co/fuwufupi/hcy7dgh/word_search_2_games_online_free.pdf
    • https://cdn.sqhk.co/xasexuwosul/bbIkkji/78914824592.pdf
    • https://leguwilevifemat.weebly.com/uploads/1/3/4/5/134595517/e97fbdb.pdf
    • https://muneberixiloza.weebly.com/uploads/1/3/4/3/134339704/jewabojijetujozux.pdf
    • https://cdn.sqhk.co/berazanoga/viakjiJ/rotilevadokaxa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8c66ed91-4457-4ad6-badc-a997f003389b/83061633217.pdf
    • http://gavekur.epizy.com/isprs_journal_of_photogrammetry_and_remote_sensing.pdf
    • https://uploads.strikinglycdn.com/files/746e3517-b5ab-4533-b09e-deba2d89d38c/parts_of_speech_notes_in_hindi.pdf
    • http://tizexazebubo.atwebpages.com/lesuf.pdf
    • http://xekazaz.myartsonline.com/xosom.pdf
    • https://uploads.strikinglycdn.com/files/5a3f426a-a1db-4f74-9248-e501579c74cb/how_to_assemble_spalding_60_acrylic_portable_basketball_hoop.pdf
    • https://uploads.strikinglycdn.com/files/2aed6c8f-a8b2-47c3-a1d4-ae6a81095982/mexoledeteteligi.pdf
    • http://jibovofafef.epizy.com/sesawiwodenu.pdf
    • https://uploads.strikinglycdn.com/files/dfee9e71-e0ef-4706-8a01-d24bfbb84dd8/smart_board_software_for_teachers_free_download.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000effb.bin
5968f336f2d016ac45cdb3f2879a77cfda71f1d8d0a941d07fc5518c96effc34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFB 5972 bytes
font_01_sfnt_off00010451.bin
5eabd978774d06b5662e1e2b51ac381ee787dd4d08bdb955a77919293aedce00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10451 10644 bytes

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