Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cb3bd7443fbe3b8…

MALICIOUS

PDF

72.8 KB Created: 2021-02-26 11:22:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bc4a53c8f64f4c894ca999b13295b62f SHA-1: 63747154c7a2b7069ff06b5d30fb63c7317832ea SHA-256: 0cb3bd7443fbe3b88c26e7a05e412c4f35395054f1854885d46a160ea9a214dd
156 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 of which are disguised as manuals or downloads, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as Pdf.Phishing.Trojan. While no scripts were explicitly extracted, the presence of numerous external URLs and the heuristic firings point towards a phishing or SEO manipulation attack pattern. The file's structure and content suggest it's designed to drive traffic to malicious sites.

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://resalured.ru/wix?keyword=onn+universal+remote+control+manual PDF link annotation
    • https://zujuwedidikaf.weebly.com/uploads/1/3/4/3/134375258/d3b70f34.pdfIn PDF document text
    • http://goodnatural.space/gigulupixadozamepilgmj11.pdfIn PDF document text
    • https://kopikemuv.weebly.com/uploads/1/3/0/7/130740389/vifesedu-gafonuravanu-fovefetolot.pdfIn PDF document text
    • https://cdn.sqhk.co/somepizeko/g9fhggf/watch_nfl_live_online_free_streaming.pdfIn PDF document text
    • http://boviriso.22web.org/binkw32._dll_for_gta_iv.pdfIn PDF document text
    • https://cdn.sqhk.co/lalivaga/c616qxA/tangle_teezer_back_comb.pdfIn PDF document text
    • https://cdn.sqhk.co/molipigi/jesgfif/vikita.pdfIn PDF document text
    • https://xugubevowasisof.weebly.com/uploads/1/3/4/8/134885616/duvof_sofudanabe_semedu.pdfIn PDF document text
    • http://ig-soft-team.com/allen_bradley_ultra_3000_error_codedr4j5.pdfIn PDF document text
    • https://numetoximo.weebly.com/uploads/1/3/4/7/134717633/ac2b567e8.pdfIn PDF document text
    • http://qrastenmap.online/lathe_cutting_tools_typesco3g3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452621/normal_5ff2c520bf3b6.pdfIn PDF document text
    • http://svoydvalend.xyz/knife_master_vs_fruit_hite6j2s.pdfIn PDF document text
    • https://cdn.sqhk.co/repipedifavi/6gfzsse/adorable_home_game_cheat_codes.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/dosalapasenow/manual_cinema_4d_r20_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/tarantula_care_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/panudakedajinelokinodew.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/6th_grade_esl_grammar_worksheets.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE102 5032 bytes
SHA-256: dac2e818b851fd66979e6de74e77193f6ff57c5731318c5f32284e903ff94631
font_01_sfnt_off0000f20d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20D 10452 bytes
SHA-256: 0da63960a52b40edb8e19dcb49e50df8c634710038ed4f4766e152ca18781866

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