Malicious PDF — malware analysis report

Static analysis result for SHA-256 5290b28be556d571…

MALICIOUS

PDF

77.9 KB Created: 2021-01-31 07:20:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b5fb9110d2e0c589913f78ca32a5e554 SHA-1: f65cf49f8592300fa818f34562f9caa8ee90d815 SHA-256: 5290b28be556d571cffcb3d3a782d5fe2ff73f816e88d248365dd35ff34a4a46
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many pointing to disposable domains, and is identified as a link farm. The presence of external URIs and the nature of the heuristics suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious intent.

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 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.
  • 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/wb?keyword=pencilmation%20wiki%20episodes PDF link annotation
    • http://gazzsheff.xyz/sausage_dog_game_of_thrones9xk6s.pdfIn PDF document text
    • https://cdn.sqhk.co/pikukafil/hmejhVJ/world_at_arms_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tajavujexiz/ijiC8jc/livewadedifumuw.pdfIn PDF document text
    • http://help-nanny.site/minecraft_new_update_2020_release_date974d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446280/normal_600c6aa7c1752.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405907/normal_6005ad322ff18.pdfIn PDF document text
    • http://keto-menu.online/xizozamexemonaelgf4.pdfIn PDF document text
    • https://cdn.sqhk.co/xinoxoxojib/biijbKR/mod_map_portugal_euro_truck_simulator_2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505771/normal_6002082142a1d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383692/normal_6008fce5264b2.pdfIn PDF document text
    • http://braco.ru/this_driver_has_been_blocked_from_loading22olq.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/nuselufuzo/88041074287.pdfIn PDF document text
    • http://surafupomef.epizy.com/linear_guide_bearing_block.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/a_thousand_years_lyrics_mp4_free.pdfIn PDF document text
    • http://retesatitogeli.epizy.com/zuvelabomegemilopis.pdfIn PDF document text
    • http://fitariruzazu.epizy.com/25038842394.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e08c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08C 5280 bytes
SHA-256: 5e0c427f6a689dd66f17350e1b4f94d88062f05c3d305198084ad55fe1f1eeae
font_01_sfnt_off0000f27e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27E 3720 bytes
SHA-256: 4f60b374cbf2a68c08ee4e6e5bd880b9285dc74a309ed42da0b9c7a2c0026502
font_02_sfnt_off0000fdde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDE 14100 bytes
SHA-256: a245df236ac58f5151105a5923400bb8b7aa9f06724a5b62b6b5b4a868c86021

Open this report in the interactive analyzer, or submit your own file for analysis.