Malicious PDF — malware analysis report

Static analysis result for SHA-256 02902816236bd5f9…

MALICIOUS

PDF

79.2 KB Created: 2021-04-11 12:21:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: a39054be44d9dcd9e67f450a2848dafe SHA-1: db3aa5396d5a74e10734f9ce707bb7670c20b841 SHA-256: 02902816236bd5f9b291e62c6eeb589bd06614baacb6d54602b0aad31fe572bd
244 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a product review, suggesting a lure. The presence of multiple PDF links and a malicious redirector indicates an attempt to lead the user to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=review+resound+multi+mic In PDF document text
    • http://lobabinuladeri.medianewsonline.com/naligibarubuvopatejilim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426090/normal_604459eb18992.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374519/normal_60331a0e5cde0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413017/normal_60059f758167d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494866/normal_6023abc60db78.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/17534844132.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423714/normal_5fe642cb1ae44.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476140/normal_60031e35b64eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469623/normal_6055a13052c31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384299/normal_6069644736027.pdfIn PDF document text
    • http://vekisonoloze.sportsontheweb.net/5099018387.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://77047a80-9f17-4504-a563-a097c25ca12e.filesusr.com/ugd/5c8b2f_bbdc5befa0104be7815f9145a69a5435.pdf?index=trueIn PDF document text
    • https://c8d0f166-86fd-441b-8df5-aa5e6c6c7644.filesusr.com/ugd/f4b3af_e819792c6c0844e5b0c689eb339a21e3.pdf?index=trueIn PDF document text
    • https://fe92b815-f0fe-4223-924b-659339f44b90.filesusr.com/ugd/8f64fc_72ccbdc8f23b4b349847dc17ec5c2a58.pdf?index=trueIn PDF document text
    • https://d321836a-1bf8-47c4-b4d3-67fe1e7f0250.filesusr.com/ugd/33ab24_b9f95c6e440945b3b177f413ad610e81.pdf?index=trueIn PDF document text
    • http://nozozuwovore.atwebpages.com/design_in_architecture_geoffrey_broadbent.pdfIn PDF document text
    • http://sutexuvidag.myartsonline.com/34003727466.pdfIn PDF document text
    • https://9df6fdd8-df71-43fb-87ad-b121b2de7416.filesusr.com/ugd/e0d0cf_5d98b97730c8445e8790b5a8a7d97679.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lanaladu/bezetunudajokibijoted.pdfIn PDF document text
    • https://d0aee4dd-c5bf-4c29-adcf-3aa844f59ef3.filesusr.com/ugd/193d13_9ffadc4309ca403bb3ccf193b32e2489.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/jazaregisuzorixag.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/terzaghi_peck_and_mesri_1996_from_soil_mechanics_in_engineering_practice.pdfIn PDF document text
    • https://ddc7b23b-31e5-4b5c-aaad-d3b7cef26861.filesusr.com/ugd/e506b8_5c78f32bb54c4b6fbc63a2c5a669ebc8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/patotale/3972949734.pdfIn PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_ad8792b6082d4a058ae40a8dd353e1ab.pdf?index=trueIn PDF document text
    • https://ffb80149-315c-4936-8637-e87477b606fc.filesusr.com/ugd/e7410d_90d655388e2c471c838ac25559f7cc2b.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF638 5036 bytes
SHA-256: 04dfd01b8f9a653210a48bbe292e2eee88fcb533556e4d920f283c4f4ab663c6
font_01_sfnt_off0001075c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075C 11320 bytes
SHA-256: f129db3c97a62e5a6da46224c401de3c70859f039e10799a21b3292230bb8ba2

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