Malicious PDF — malware analysis report

Static analysis result for SHA-256 2be917bcc9db3c0f…

MALICIOUS

PDF

85.4 KB Created: 2021-05-08 18:43:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 033d040a399fd760d794fd3ab4199d11 SHA-1: de20389e19f3d9e201cb507c11b99dab0273618c SHA-256: 2be917bcc9db3c0f0d46723c33fac9e418399f6136d5bab59e08159b93eb7380
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, identified by the 'PDF_SEO_LINK_FARM' heuristic, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier further indicate malicious intent. The embedded URLs point to various PDF files, likely to mislead users or for SEO manipulation.

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://bologen.ru/strik?utm_term=icoffee+opus+single+serve+coffee+maker
    • https://cdn.sqhk.co/muzipajat/p6nBt3g/sas_statistical_software_free_trial.pdf
    • https://rigavedisibabaz.weebly.com/uploads/1/3/4/9/134902328/837720.pdf
    • https://cdn.sqhk.co/nivavepe/gdyjhie/history_channel_directv_number.pdf
    • http://lodomujimujug.mywebcommunity.org/the_love_dare_day_by_day_reviews.pdf
    • http://bitoxifa.sportsontheweb.net/apron_patterns_free.pdf
    • https://cdn.sqhk.co/gekakisoduvo/gLVhjdl/tipos_de_sujeito.pdf
    • http://gepokupaburorew.mywebcommunity.org/bbc_compacta_class_11_english_solutions.pdf
    • https://cdn.sqhk.co/numanazolov/jiagdI1/nike_sky_force_3_4_grey_fog.pdf
    • http://lifegirls.site/947761886694tcnr.pdf
    • https://cdn.sqhk.co/vogoxaginoje/mO3mukH/78342440575.pdf
    • http://vengriya.space/7995524113ak1c1.pdf
    • https://sesemuxedewa.weebly.com/uploads/1/3/4/0/134017121/botaterosezari.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zuvovoxigumuz/sagozevagapi.pdf
    • https://s3.amazonaws.com/xufujofaleki/67643441707.pdf
    • https://s3.amazonaws.com/nawosineromigi/3mm_foamex_sheets.pdf
    • https://s3.amazonaws.com/nufidibodudulad/motorola_talkabout_t605_review.pdf
    • https://s3.amazonaws.com/wejuvono/boxilelifafupaxaza.pdf
    • https://s3.amazonaws.com/viromibukoleliw/64805956416.pdf
    • https://s3.amazonaws.com/bikikanafopavu/pet_animals_hd_photos.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_off00011201.bin
176af461ac4239fb2bf04ddda1820b7d62f9baf57f2422fcb40001ce06c30655
pdf-font-stream PDF embedded font (sfnt) at offset 0x11201 5396 bytes
font_01_sfnt_off00012454.bin
5b8e9de12b112ac40b0a8a388466584031de0857ed90810bcff76fc8b2ecfe16
pdf-font-stream PDF embedded font (sfnt) at offset 0x12454 10680 bytes