Malicious PDF — malware analysis report

Static analysis result for SHA-256 781300278debbe0d…

MALICIOUS

PDF

71.0 KB Created: 2021-04-09 10:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 8008d86ae50bd8474cad143777f6ba03 SHA-1: 949a54c58049d570e6dfbd6532e2558ab448d402 SHA-256: 781300278debbe0d9e63ca3f1e69057e715318d7a7d18ba7aae855bae9f9142a
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with a significant number pointing to a link farm designed to obscure the ultimate destination. The primary malicious URL identified is https://soxebez.ru/strik, which is likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/strik?utm_term=america+history+of+our+nation+textbook PDF link annotation
    • https://fukukajapojuj.weebly.com/uploads/1/3/2/8/132815924/537a823.pdfIn PDF document text
    • https://cdn.sqhk.co/puvelumilum/bWpgfnI/live_football_on_tv_fixtures_bt_sport.pdfIn PDF document text
    • https://cdn.sqhk.co/tenalewi/giRghGW/skyrim_dragon_names_vuljotnaak.pdfIn PDF document text
    • https://dotuxebi.weebly.com/uploads/1/3/1/4/131454754/a522a3fd81f5a.pdfIn PDF document text
    • https://pesuwoleze.weebly.com/uploads/1/3/5/2/135295903/21efd0.pdfIn PDF document text
    • https://pumaxodevuk.weebly.com/uploads/1/3/1/8/131872084/xofom_wibomixipe.pdfIn PDF document text
    • https://kalozepi.weebly.com/uploads/1/3/0/8/130814360/puxog_jepemepuxodor.pdfIn PDF document text
    • https://famofupogatom.weebly.com/uploads/1/3/0/7/130739443/lorolojosuwifa-garodelikix.pdfIn PDF document text
    • https://lurutedus.weebly.com/uploads/1/3/4/7/134775874/lotinepemisojeg.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/naxozelozude/information_technology_project_manager_career_path.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/kawetigegob.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/automatisme_cours_gratuit.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/king_james_bible_1611.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/xerusurebedepaxivurizosom.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/gilov.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/81348851066.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/botevijosekuripilafa.pdfIn PDF document text
    • https://s3.amazonaws.com/dexodekelaseki/36303643181.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/how_to_bypass_lid_switch_on_kenmore_washer.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/gixakepopesun.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_off0000da5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5E 5452 bytes
SHA-256: aec595b051eb1e330b8de653cf7b614a0759b9b9a6b5855c9ce4b98385b473e3
font_01_sfnt_off0000ecc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC8 10048 bytes
SHA-256: c0aae7c04a5b3d9f4e198c0dfcc9f2a28cdf0e902dde62fc0a40d535ffe6f879

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