Malicious PDF — malware analysis report

Static analysis result for SHA-256 e197abcc9c4776ff…

MALICIOUS

PDF

86.2 KB Created: 2021-03-26 06:38:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 893d071be716cd605c3944498ef013e4 SHA-1: 7409192940a7c2ad45690187ee294434a6d3cee3 SHA-256: e197abcc9c4776ff990734b09e9034f9bb6b730930f43613695365a7c2a414d8
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to drive traffic to various websites. The presence of multiple unknown URLs, including 'https://zajinet.ru/wix?keyword=j+pop+boy+band+kissing', indicates a malicious intent to redirect users. ClamAV detection and ML classification further support the malicious nature of this file, likely used as a distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wix?keyword=j+pop+boy+band+kissing
    • https://cdn.sqhk.co/devisofage/igUqrhc/airport_airlines_air_traffic_control.pdf
    • http://keepxufi.space/32840593541lztoo.pdf
    • https://cdn.sqhk.co/gapalagabig/rigeieY/95664520297.pdf
    • https://cdn.sqhk.co/doparibi/hbIyjeH/basic_english_grammar_betty_azar_workbook.pdf
    • https://cdn.sqhk.co/puwipaneke/ZggrhB2/dragon_quest_viii_3ds_review.pdf
    • http://ductsunlimitedins.com/sunesadewo7qx13.pdf
    • https://static.s123-cdn-static.com/uploads/4368478/normal_5fe40221825e9.pdf
    • https://cdn-cms.f-static.net/uploads/4473618/normal_6038f41922626.pdf
    • https://cdn-cms.f-static.net/uploads/4381748/normal_603fadb82d98f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://86146b48-cf95-488a-b5a0-22832f4589a6.filesusr.com/ugd/3b4eee_f5f1022f615c4f3e90bb006d8ce9d488.pdf?index=true
    • https://7a1f2a0d-094a-4466-88af-72a4af93b9fa.filesusr.com/ugd/22739b_26b76f00af804dea9caf48c8b7fb7d3b.pdf?index=true
    • https://dc010c70-835d-4b56-8cb0-1e1bda7cab64.filesusr.com/ugd/fb576b_a1a6d645bd9c4e6496baa75dd7ea2b30.pdf?index=true
    • https://83d7d1d1-3661-4158-a2cc-78aa4aa39d08.filesusr.com/ugd/163759_5d591aa9a191445685128fe23728d761.pdf?index=true
    • https://s3.amazonaws.com/degisapemifa/junazuvezelubelobav.pdf
    • https://s3.amazonaws.com/rupatojuko/graph_analysis_practice_worksheet.pdf
    • https://s3.amazonaws.com/firigugixujotov/vpn_browser_for_windows_8.pdf
    • https://aed022ca-8a9d-452d-9022-56a74a585a14.filesusr.com/ugd/4d548e_1427b286acf1485fbc7442713c8bffd4.pdf?index=true
    • https://s3.amazonaws.com/wobuzisibal/xepegovepa.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_off0001116d.bin
cc4cc76c9aed61a0b6fe601f7a492af6b0844cc2a358c288070ed0a1aef4d31a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1116D 5296 bytes
font_01_sfnt_off00012386.bin
105bc3439107e51493c3e56e4f3b09f19b5ce27059b238c40e4eae81e4492148		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12386 12000 bytes

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