Malicious PDF — malware analysis report

Static analysis result for SHA-256 c90ff4a30ad6714e…

MALICIOUS

PDF

73.6 KB Created: 2020-12-23 13:46:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 013d874ceb50e722bb4eaf88a798a3e4 SHA-1: 7424bbef1c5414822b2929e54819ef6b0706182b SHA-256: c90ff4a30ad6714eaffb9152ded4408d584eddd368a79c86d31a0bf6c3160243
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 pointing to S3 buckets and other hosting services, suggesting a link farm or SEO poisoning attempt. One prominent URL, 'https://traffset.ru/strik?utm_term=hallmark+movies+now+app+on+lg+smart+tv', is likely a phishing or malware distribution endpoint. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffset.ru/strik?utm_term=hallmark+movies+now+app+on+lg+smart+tv PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4478946/normal_5fbaadec26f55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382781/normal_5fb2c8ed499ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425913/normal_5fa9ff3f40482.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413118/normal_5fc5ab002648e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410976/normal_5fa30c0ba7e15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464730/normal_5fe269ef9cd63.pdfIn PDF document text
    • https://biwomewiwuxe.weebly.com/uploads/1/3/4/1/134131409/vemin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/body_check_hockey_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01bc65b1-6f27-4d72-a204-a08d2e4e5f55/vianon_peivo_online.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/appvn_apk_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/spongebob_squarepants_movie_game_pc_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/81194616063.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/62230005544.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/tawonagawomurusopo.pdfIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF84 5316 bytes
SHA-256: f703bbbd2f59b3d5ec38371cc87890cf6b95482ed3f5b9929aaba1760a41159d
font_01_sfnt_off0000e199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE199 9956 bytes
SHA-256: 06de988c98f2270a2399a07384f0573fd091fa5baabf29a8b9db6289b023ff9d
font_02_sfnt_off000103e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E8 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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