Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ec58b59ae5feab9…

MALICIOUS

PDF

112.7 KB Created: 2021-04-04 02:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 8b42ea20b8c356f43dcca696494b41e0 SHA-1: 4aa94d9de237db70a9d08feea10ac971197e9045 SHA-256: 7ec58b59ae5feab97f2d703bb8d5e18e963f32a8d5eefd87fd492324b28f8715
186 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 hosted on disposable domains, indicating it is part of a link farm designed to drive traffic to various websites. The heuristic 'PDF_SEO_LINK_FARM' and the presence of numerous URLs strongly suggest this malicious intent. While no scripts were directly extracted, the nature of the link farm and the ClamAV detection as 'Pdf.Phishing.Trojan' point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/award?keyword=percakapan+bahasa+arab+amiyah+saudi+pdf PDF link annotation
    • https://wogalipa.weebly.com/uploads/1/3/4/3/134316604/5bed989930a.pdfIn PDF document text
    • https://todumubisopid.weebly.com/uploads/1/3/5/3/135312552/15d75d26548e181.pdfIn PDF document text
    • https://nelejezubifub.weebly.com/uploads/1/3/1/4/131406077/3403171.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499633/normal_603e7f08c169b.pdfIn PDF document text
    • https://lebudikex.weebly.com/uploads/1/3/5/3/135310552/2690227.pdfIn PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/e734e3ac1759e83.pdfIn PDF document text
    • https://gimepokik.weebly.com/uploads/1/3/1/6/131636980/9cb89ba.pdfIn PDF document text
    • https://kogexabisuzim.weebly.com/uploads/1/3/4/3/134322867/baed797.pdfIn PDF document text
    • https://wezenazuzive.weebly.com/uploads/1/3/4/7/134764498/d9ce225e33.pdfIn PDF document text
    • https://lovalizivida.weebly.com/uploads/1/3/5/9/135990258/7d484f604c.pdfIn PDF document text
    • https://didiseripipake.weebly.com/uploads/1/3/4/3/134344006/wefeguzon-winowoza.pdfIn PDF document text
    • http://savodaveb.22web.org/minolta_maxxum_7000i_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499622/normal_60098dfa88051.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476756/normal_5fe34f139b038.pdfIn PDF document text
    • https://noparerekum.weebly.com/uploads/1/3/4/6/134639333/manumaf.pdfIn PDF document text
    • http://pefaninax.22web.org/xukazorebobofufob.pdfIn PDF document text
    • https://bewotababuruga.weebly.com/uploads/1/3/1/1/131163836/1663883.pdfIn PDF document text
    • https://xokewetabido.weebly.com/uploads/1/3/1/8/131857041/3956072.pdfIn PDF document text
    • https://bidemujoniju.weebly.com/uploads/1/3/1/8/131856381/xalati.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://44879a12-c10a-431c-a98a-7de142752d0f.filesusr.com/ugd/bb4607_11f3964703a647af87efae4f985e9eae.pdf?index=trueIn PDF document text
    • http://jedabotuz.epizy.com/center_parcs_elveden_activities.pdfIn PDF document text
    • http://wigogejuj.epizy.com/toyota_camry_hybrid_2019_for_sale_in_vancouver_bc.pdfIn PDF document text
    • https://0fc0baf9-b884-4fcd-968e-f93c0f938930.filesusr.com/ugd/68ec51_da93b58030b444d690d181b3772e14cc.pdf?index=trueIn PDF document text
    • https://ec75ba9f-29a7-4b73-bb51-4c951d20089f.filesusr.com/ugd/17cde0_04628c5cf3b64781b455abf11580c06d.pdf?index=trueIn PDF document text
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_68e8d33009c74507a0551f85558963c7.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000179ae.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x179AE 34812 bytes
SHA-256: 7c29fa436b7fb3a42cc6ebd941ed03ca778cc9fc03b4baa3668698fce858b880
font_00_sfnt_off00014203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14203 5672 bytes
SHA-256: ea08f48972eeda8796c3148862fd9f9526a58c515a7dbb86e2518bee31382672
font_01_sfnt_off00015527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15527 10628 bytes
SHA-256: 1fca7b6476564a38b9d2a6ec654d09dd06e3d7e821d651e92daac4220dea85d2

Open this report in the interactive analyzer, or submit your own file for analysis.