Malicious PDF — malware analysis report

Static analysis result for SHA-256 48f1724ebe289ab7…

MALICIOUS

PDF

80.0 KB Created: 2021-03-23 05:36:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7ffa21bcc236dbb6d0ec6757b59464f SHA-1: 2c901249f02d6b2b135fba7ccccfdf291b07df91 SHA-256: 48f1724ebe289ab7faa5c25c1316a83c6d0cf3fe789519776d460e1f5f863a13
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-themed, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/award?keyword=16+point+observer+report+form+2020+pdf
    • https://cdn-cms.f-static.net/uploads/4413117/normal_6022678162543.pdf
    • http://bottlechainworld.com/beginning_cosmetic_chemistry_downloadvqqh8.pdf
    • https://cdn.sqhk.co/dagufiwus/cidhfjc/30479780029.pdf
    • https://cdn-cms.f-static.net/uploads/4500001/normal_60358c55a6b68.pdf
    • https://cdn-cms.f-static.net/uploads/4471253/normal_601073592346d.pdf
    • https://xavapijiwo.weebly.com/uploads/1/3/3/9/133997403/d6699ab17606b0.pdf
    • https://cdn.sqhk.co/semiwewedazi/haigJih/jipivijeruzokekivuxazisu.pdf
    • https://cdn.sqhk.co/fumodolanes/jbhfXja/lebaran_2020_tanggal.pdf
    • https://cdn.sqhk.co/pininipata/jeigoic/spanish_learning_books_free_download.pdf
    • http://mbfsopg.com/intermediate_accounting_ifrs_solution_manualhkj1n.pdf
    • https://rusipamisu.weebly.com/uploads/1/3/4/0/134017355/xabaxasinub.pdf
    • https://komijeji.weebly.com/uploads/1/3/1/6/131606126/zewobelaxitabebonu.pdf
    • http://coins24h.com/alesis_strike_pro_reviewyhzfy.pdf
    • https://cdn.sqhk.co/xumifutave/ejLgipu/zunumomilosikamibojuf.pdf
    • https://cdn.sqhk.co/wetaxawirewu/ezjRQIS/40942000464.pdf
    • http://tesocoin.online/nordictrack_c990_for_sale_canadal6phz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://c5c27394-2042-4749-9b39-d1c24dcbd9f0.filesusr.com/ugd/e9b987_e103132bf3b647e3bf69b8922150c7ae.pdf?index=true
    • https://45f91bdd-2b68-4e60-ae2c-b14373ae5332.filesusr.com/ugd/0d089b_6ca0d786e7b84102b5288852459d56c2.pdf?index=true
    • https://2489a575-72f7-492f-b117-28cfe4a4d2a3.filesusr.com/ugd/d81705_caa61da96ece45269ad165d8a50c9899.pdf?index=true
    • https://2b12d24f-0c9a-4a32-b427-430aba395f0c.filesusr.com/ugd/6cfe90_2198b96301de4c0db1e0e5175bd0fe73.pdf?index=true
    • https://9d349da1-218b-4b59-9e37-2a90cab56d40.filesusr.com/ugd/de9003_131df427e6b349faa116e00a04d6be34.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecc1.bin
82156fc81d6effb142b2cd410adfc4d4e3823d74e362dcb68a75157afa30a487		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECC1 5316 bytes
font_01_sfnt_off0000feb6.bin
415583c154627ce16b64cc1de73f0a4de32687d703c9769a7176ecb6ef679a45		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB6 11268 bytes
font_02_sfnt_off00012507.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12507 4324 bytes

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