Malicious PDF — malware analysis report

Static analysis result for SHA-256 707ce06425611e47…

MALICIOUS

PDF

82.3 KB Created: 2021-01-18 20:49:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1cc99fd04b3fc39c228848c38f2ad542 SHA-1: 994f8c7c602b1ddaf683edde2bb38e7e43627c9a SHA-256: 707ce06425611e47753255b67026b9d499daa12483eb3590fcd2684205b3bb9b
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristics suggest it's designed to redirect users to malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/123?utm_term=a+monster+calls+pdf+espa%25C3%25B1ol
    • https://cdn.sqhk.co/dejojoduzi/mwhdpMw/70802377199.pdf
    • https://cdn.sqhk.co/larovejadeb/KGngxid/tepawogalew.pdf
    • https://cdn.sqhk.co/kululojilo/1IjaihB/koan_sound_sample_pack.pdf
    • https://site-1172862.mozfiles.com/files/1172862/butterfly_table_tennis_racket_case.pdf
    • https://site-1084296.mozfiles.com/files/1084296/bowling_league_score_sheet_template.pdf
    • https://cdn.sqhk.co/vatuliwa/geidjbq/international_dna_day_in_us.pdf
    • https://cdn.sqhk.co/xurazegoba/fNgdnhe/774859663.pdf
    • https://cdn.sqhk.co/kakumipoman/gciedhc/dr_sarah_davenport_psychologist.pdf
    • https://cdn.sqhk.co/zudilubal/Ejcmche/hand_simulator_survival_pc.pdf
    • https://site-1168170.mozfiles.com/files/1168170/41816107010.pdf
    • https://cdn.sqhk.co/kimefutif/gid5txs/air_traffic_control_assistant_salary_uk.pdf
    • https://site-1168513.mozfiles.com/files/1168513/difference_between_template_and_templateurl_in_angular.pdf
    • https://cdn.sqhk.co/ruwonumatag/yjiZwhd/transfer_all_content_from_android_to_android.pdf
    • https://duxepanakotijek.weebly.com/uploads/1/3/4/3/134340233/753e9862b8ae35f.pdf
    • https://levubitadogu.weebly.com/uploads/1/3/4/7/134727965/miwanezukiw.pdf
    • https://site-1178505.mozfiles.com/files/1178505/seamless_transitions_premiere_pro_templates.pdf
    • https://cdn.sqhk.co/vekuperik/fiblUhg/the_wiki_game_rules.pdf
    • https://ninisajata.weebly.com/uploads/1/3/4/8/134869212/9445653.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xidazeze/chopsticks_sheet_music_easy.pdf
    • https://s3.amazonaws.com/liwara/acetyl_coa_formation_reactants_and_products.pdf
    • https://s3.amazonaws.com/gupojakami/audi_a4_avant_2006_manual.pdf
    • https://s3.amazonaws.com/ligole/dead_or_alive_5_pc.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_off0001059b.bin
ed8ecbe297260d9f11f92b9c1233fcec6a6893e2d392496514a30a31e637006c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1059B 5504 bytes
font_01_sfnt_off000117ff.bin
7fd5bed870d6ad48c59b5be755fff215c6a3ba98ad30b912914d2419694efb56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117FF 10224 bytes

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