Malicious PDF — malware analysis report

Static analysis result for SHA-256 02ea7b96a0bfa509…

MALICIOUS

PDF

84.3 KB Created: 2021-04-05 03:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9780b7a3b0f3789f5e998e734c9a9bc SHA-1: 9041a84456eb2bb71df3e937396650215f41c63e SHA-256: 02ea7b96a0bfa509e9364fae722385b9d36572805fe17a8bae87b15bb9d3f5b2
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 point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or SEO spam attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/strik?utm_term=apollo+twin+mkii+duo+usb
    • https://zuzotupewumu.weebly.com/uploads/1/3/4/6/134691050/7003962.pdf
    • https://ratipiju.weebly.com/uploads/1/3/0/7/130740089/fa9b9d789c1c.pdf
    • https://cdn.sqhk.co/zowuvutevak/gdjdeig/cryoprecipitate_transfusion_guidelines_aabb.pdf
    • https://cdn.sqhk.co/wazikunal/jboghGv/defender_marine_sale_date.pdf
    • https://cdn.sqhk.co/lotidonita/jZsyiWS/30079719296.pdf
    • https://static.s123-cdn-static.com/uploads/4486745/normal_5fe5edd94b21c.pdf
    • http://4gusevshop.space/62038028940nt1c2.pdf
    • https://rotemewan.weebly.com/uploads/1/3/1/3/131380756/rowatawoniku-pejawigo-gimezibup-gapak.pdf
    • https://cdn.sqhk.co/zenekukera/LxGifha/widget_moto_g5_download.pdf
    • https://cdn.sqhk.co/wazafepel/hehdFtK/block_breaker_3_play_online.pdf
    • http://itdiscounts.info/rinanugaduvameoirwa.pdf
    • https://cdn-cms.f-static.net/uploads/4414678/normal_6022ca7417381.pdf
    • http://skidki-day.shop/jezelexarugemamosokpkxaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rafiralexezol/tafseer_of_holy_quran_in_english.pdf
    • https://s3.amazonaws.com/fekazudabo/lenujaxofomolebo.pdf
    • https://s3.amazonaws.com/teximikamukubo/biology_gcse_for_aqa_kerboodle_book_answers.pdf
    • https://s3.amazonaws.com/vabedafozo/la_la_land_sheet_music_free.pdf
    • https://s3.amazonaws.com/xipavir/fozoxujamitofedutewuno.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f775.bin
474bd236d9b9cdb149a50280420fb852c0cbcf1d3a201bd353061a3bfbd6c454		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF775 5084 bytes
font_01_sfnt_off000108bd.bin
6670adc739e8aa1400e8112e625d587defcebb5b94b790cbb38079b6d8b6e3fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108BD 11296 bytes
font_02_sfnt_off00012f52.bin
d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F52 16060 bytes

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