Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba0b5deaf6792266…

MALICIOUS

PDF

74.5 KB Created: 2021-03-14 00:13:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8ca3fe9a7dad0118135bbb8fabf4757 SHA-1: 98f0be3742c8cdcb9fe71f9b928d59ddcd60e3a5 SHA-256: ba0b5deaf679226620e4abdbf250366898d43324e7c898a791a877b6e0c1d7f8
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URLs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/123?utm_term=hydration+energy+chemguide
    • https://falatunasozenu.weebly.com/uploads/1/3/4/7/134762474/84819ca.pdf
    • https://puroporutenes.weebly.com/uploads/1/3/1/6/131606954/4313190.pdf
    • https://dibevapanowodi.weebly.com/uploads/1/3/0/7/130776811/pabedamelenoda-vetutufur.pdf
    • http://helpverifedbadges.com/78600840888x7foq.pdf
    • https://cdn.sqhk.co/kiribikiv/gejaxji/mikus.pdf
    • http://floradoma.net/miami_airport_food_guidef3ini.pdf
    • https://cdn.sqhk.co/nexasolonit/gfzGgdJ/cruise_ship_driving_racer_video.pdf
    • https://gonewama.weebly.com/uploads/1/3/4/0/134095907/dirovowufirupo-vijafusemelinup-terexonav-sozagotip.pdf
    • https://cdn.sqhk.co/gituxogud/ahdmSbp/52302962152.pdf
    • https://cdn.sqhk.co/niripakexad/WjjJriy/17263982483.pdf
    • https://cdn.sqhk.co/lobinazema/iepibDo/hubbard_furniture_spencerville.pdf
    • http://doordash.link/89456268549flfbd.pdf
    • http://wejnpowk.space/historia_de_la_medicina_manuel_barquvx22k.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wewuxuviwar/google_slides_animation_templates.pdf
    • https://22520ec4-2132-45a5-98b8-54db1b71d3ea.filesusr.com/ugd/b33b96_1f24c43af6214815acbd816721592a5a.pdf?index=true
    • https://s3.amazonaws.com/kisagoz/happy_new_year_lovely_song_free.pdf
    • https://s3.amazonaws.com/bisegilupuf/funny_cat_video_song_free.pdf
    • https://s3.amazonaws.com/dazifozixawus/xepunatuxajisepis.pdf
    • https://e1cf253b-b3af-4135-a675-1c3c021177f9.filesusr.com/ugd/111c46_d0badc9191554e87a0c483fa16cdfae6.pdf?index=true
    • https://s3.amazonaws.com/zarevizebi/juliv.pdf
    • https://s3.amazonaws.com/lovomijelun/61218788554.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_off0000e803.bin
4b73f7760b314657ba8453edd4e76025f5e70739eac26d37837585ebe9e22210		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE803 5208 bytes
font_01_sfnt_off0000f996.bin
568bfc028408221c79909a1957999d663553f1d69b61c944bc9e00f50718f82b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF996 10296 bytes

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