Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d2938b0a01d2be6…

MALICIOUS

PDF

69.2 KB Created: 2021-05-31 04:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fce64a4b64249eeee9114ae33398ca5 SHA-1: a906879c3e8756ae47c2faa3b361e1428a09ee0a SHA-256: 9d2938b0a01d2be6f643595c4b907cdc3379eb481bec1b2dd140aa32d4c3caf6
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to suspicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains metadata suggesting it's a technical document, which is likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://gimoguvi.ru/strik?utm_term=algoritma+geli%25C5%259Ftirme+ve+programlamaya+giri%25C5%259F+14.+bask%25C4%25B1
    • https://balolekuzuwuvaz.weebly.com/uploads/1/3/0/7/130740598/nilobokirijugi.pdf
    • https://latuguno.weebly.com/uploads/1/3/1/6/131606113/7b244579868.pdf
    • https://ribufesoguvas.weebly.com/uploads/1/3/4/6/134680119/vonalanefup_rewepu_visifavitajuwa.pdf
    • https://cdn-cms.f-static.net/uploads/4386852/normal_5fd83080e037b.pdf
    • https://cdn-cms.f-static.net/uploads/4492253/normal_5fdc6f09f22f7.pdf
    • https://cdn-cms.f-static.net/uploads/4498893/normal_6059c3875913f.pdf
    • https://cdn-cms.f-static.net/uploads/4485309/normal_601d99325abde.pdf
    • https://cdn-cms.f-static.net/uploads/4392191/normal_60625bbee78e7.pdf
    • https://static.s123-cdn-static.com/uploads/4491436/normal_600906c8ed4e9.pdf
    • https://fumuradowije.weebly.com/uploads/1/3/0/7/130739974/kodaxe-rebama-zuxepovusom.pdf
    • https://static.s123-cdn-static.com/uploads/4379046/normal_5fc7bba8c3497.pdf
    • https://static.s123-cdn-static.com/uploads/4373782/normal_5ff928e0a25a1.pdf
    • https://cdn-cms.f-static.net/uploads/4498992/normal_604df08f26350.pdf
    • https://static.s123-cdn-static-d.com/uploads/4454546/normal_60b109d45eeea.pdf
    • https://xisaxori.weebly.com/uploads/1/3/5/3/135324705/66eee9262a6c4.pdf
    • https://static.s123-cdn-static.com/uploads/4445890/normal_5fe4a373e166b.pdf
    • https://kiledakod.weebly.com/uploads/1/3/5/3/135385809/2b0e7c05c6.pdf
    • https://dijatetobof.weebly.com/uploads/1/3/4/3/134322453/nurowav.pdf
    • https://cdn-cms.f-static.net/uploads/4366381/normal_60215b5fb91fc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c84121b4-35c3-4ad1-8b4b-882d59642a17/how_do_i_reset_my_jeep_grand_cherokee_radio.pdf
    • https://uploads.strikinglycdn.com/files/f1b46a11-b62d-4ce1-b54c-743cd4047fc3/maytag_washing_machinef02_error.pdf
    • https://uploads.strikinglycdn.com/files/df0b2b75-f886-4f60-bbf5-7d62807283d9/68906882725.pdf
    • https://uploads.strikinglycdn.com/files/91b8900a-33c8-4ee4-8ba0-dc148b90729c/90564868544.pdf
    • https://uploads.strikinglycdn.com/files/5abf4e89-576b-4868-a30e-c660da35d520/bosch_shx68t55uc_02_specs.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_off0000cc58.bin
84abff5122b9a433b7b10d069d4561bafe0c95290066e35acdfb02604a4c1368
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC58 5948 bytes
font_01_sfnt_off0000e022.bin
2400a7ea036308198c5ab85322b1776105cafb51f1dd4a051aa2a657daea514b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE022 11492 bytes