Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb2fbae980ae4520…

MALICIOUS

PDF

73.1 KB Created: 2021-03-30 11:39:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 40ccb1e2a3eb7ff038fcaa9ad9302990 SHA-1: 51ed26bb5c5fea0e7556fa23d74d7bff7c1e4184 SHA-256: fb2fbae980ae4520309c70b0ffcff5b1c48acb5f7e440ea7136219dc87bcd4ca
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crophysi.ru/wix?keyword=togaf+9.2+foundation+study+guide+pdf+free+download PDF link annotation
    • https://vubosetupis.weebly.com/uploads/1/3/4/5/134594606/nupamawokafaza.pdfIn PDF document text
    • https://cdn.sqhk.co/pagozixupezi/7QBTNhi/sapofefobanaviwulubevegak.pdfIn PDF document text
    • http://ottics.ru/gta_san_andreas_kyafet_hilelerict7nj.pdfIn PDF document text
    • http://kyponnik.online/741600635928qgyk.pdfIn PDF document text
    • http://uablog.website/can_kindle_paperwhite_use_overdriveko3aw.pdfIn PDF document text
    • http://hookup154.fun/satyanarayana_pooja06u07.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/jathiji/tigesavezodavawazezodoju.pdfIn PDF document text
    • https://viwalamul.weebly.com/uploads/1/3/3/9/133997630/401247.pdfIn PDF document text
    • https://cdn.sqhk.co/kanemili/vEjjY3e/ultimate_horse_simulator.pdfIn PDF document text
    • https://cdn.sqhk.co/jovakuki/hcjfgfl/inside_out_2011_parents_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/pumibavi/ijghgjE/glow_air_hockey_online_download.pdfIn PDF document text
    • https://lajutiruwogow.weebly.com/uploads/1/3/4/5/134585316/pipevuvutaj.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/aihgfhd/amazon_prime_video_cost_student.pdfIn PDF document text
    • http://xapiduxirob.mywebcommunity.org/93487482259.pdfIn PDF document text
    • https://cdn.sqhk.co/runolisor/jihbiiA/camera_translator_all_translate.pdfIn PDF document text
    • http://bluhgang.best/sears_lawn_mower_carburetor_repair_kit3rcja.pdfIn PDF document text
    • https://nefawuwezogixo.weebly.com/uploads/1/3/1/1/131163734/3005489.pdfIn PDF document text
    • http://vkrowl.com/tigaxevaraleraxoxirawfbek.pdfIn PDF document text
    • https://nexudusuje.weebly.com/uploads/1/3/0/7/130740550/50685e53d86af.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwuwoki/jajgajf/vakujuwudobisukuzo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuragumok.atwebpages.com/definition_of_anemia_in_pregnancy.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_off0000dd59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD59 5672 bytes
SHA-256: 950fb9fa84a1dd0172f5048f9d0f91b2012a36cf1fcfdfb4ecb1fb1988b90f4e
font_01_sfnt_off0000f0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DF 11304 bytes
SHA-256: bfcf45a36ac74f1f637e0ddd428511449e2e828efa48e218409c7810df46575f

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