Malicious PDF — malware analysis report

Static analysis result for SHA-256 62dbc6f20dcdd790…

MALICIOUS

PDF

78.2 KB Created: 2021-03-04 20:24:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4081e6efb087883047b993a4b990fd72 SHA-1: 737dcb9fa31f15e38257288c8a0bfe9acc7546fc SHA-256: 62dbc6f20dcdd7904ae2d67bb783707fdf866d9dc4e89e14f1378ccf78c2674b
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. The document contains a large number of external links, a technique often used in SEO link farms to obscure malicious destinations. One of the primary URLs, 'https://jottigo.ru/strik?utm_term=sound+effects+bible+pdf', appears to be a lure, while others like 'https://cdn.sqhk.co/busumodofu/haibxjh/8693411375.pdf' are part of the link farm infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/strik?utm_term=sound+effects+bible+pdf PDF link annotation
    • https://cdn.sqhk.co/busumodofu/haibxjh/8693411375.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxivuxovu/jaUghYD/22701288614.pdfIn PDF document text
    • https://pepevifive.weebly.com/uploads/1/3/4/4/134480859/jikaxekagofuguw_bobusaful.pdfIn PDF document text
    • https://bizitaninajoki.weebly.com/uploads/1/3/5/3/135316521/sixinigaxe.pdfIn PDF document text
    • https://cdn.sqhk.co/bupitagalir/nFghMUP/petroleum_engineering_universities_in_texas.pdfIn PDF document text
    • https://ralirepiputup.weebly.com/uploads/1/3/4/8/134852471/400d6c2640.pdfIn PDF document text
    • https://cdn.sqhk.co/lolatonuvesa/WVutjhc/advertising_manager_jobs_chicago.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/ibLAzvJ/91144569544.pdfIn PDF document text
    • https://cdn.sqhk.co/zapimafe/9gh6jdW/70625945453.pdfIn PDF document text
    • https://cdn.sqhk.co/ratijojitud/jIwhhhf/bawarerewoxilagare.pdfIn PDF document text
    • https://nojamatisi.weebly.com/uploads/1/3/1/3/131384142/woxas.pdfIn PDF document text
    • https://wepusiviji.weebly.com/uploads/1/3/4/6/134661614/4250806.pdfIn PDF document text
    • https://cdn.sqhk.co/vatomepipiw/rUjb9iJ/ordinary_meaning_law.pdfIn PDF document text
    • https://cdn.sqhk.co/vafodagusun/gl4fhdB/71685772048.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/jkghwjb/78419264084.pdfIn PDF document text
    • https://cdn.sqhk.co/valujoper/bf6ihIj/schlacht_an_der_marne_1914_zusammenfassung.pdfIn PDF document text
    • https://cdn.sqhk.co/jalosemuv/3zifpCT/brain_games_for_adults_brain_training_games.pdfIn PDF document text
    • https://cdn.sqhk.co/lexebogefaj/gidjafg/metal_slug_defense_mod_apk_obb.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/xalexojaxipud/tupesatusad.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/xotafi.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/sheet_music_debussy_arabesque_1.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/chi_health_omaha_medical_records.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_off0000f5ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FF 5084 bytes
SHA-256: 7beb0090d48128f4a31ba9a4fc54074659c0a8e83b70eeb5dcb8ce8362f55812
font_01_sfnt_off00010761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10761 10904 bytes
SHA-256: e4d48b9a53bfd1607fe7141d0d859abf91f5f5d759f17380f167202558427086

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