Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3dd23ac3cb0c724…

MALICIOUS

PDF

88.9 KB Created: 2021-03-01 12:35:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f1a476241e3c876754d61b75cb1bc415 SHA-1: 823162a271933a8f403ef632ada410a7dfe5d915 SHA-256: d3dd23ac3cb0c7243ceb2326d53f6996daa247b1a986bea3232c1fd4142f8744
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The presence of a URL with 'firmware' in the query parameters indicates a lure for users seeking software updates, a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://ponafet.ru/123?utm_term=hd18q+mxq+amlogic+s805+firmware PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4372982/normal_5fed3b152a441.pdfIn PDF document text
    • https://bilujadaju.weebly.com/uploads/1/3/4/7/134772480/c90f23bd68f2bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450151/normal_5fe358f3d9d6d.pdfIn PDF document text
    • https://tedatigajixa.weebly.com/uploads/1/3/0/7/130739480/4159836.pdfIn PDF document text
    • https://cdn.sqhk.co/muvotugi/fwhiiiY/lonuselekexofakesum.pdfIn PDF document text
    • https://woxazalaxit.weebly.com/uploads/1/3/4/2/134235403/boferig.pdfIn PDF document text
    • http://budokudepa.scienceontheweb.net/docker_command_list_images_in_registry.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393631/normal_5ff56959a963d.pdfIn PDF document text
    • http://wumiwuzigimo.mywebcommunity.org/anna_todd_book_1.pdfIn PDF document text
    • http://lamaded.mywebcommunity.org/alexander_the_great_movie_online_subtitrat.pdfIn PDF document text
    • https://jolibudowuw.weebly.com/uploads/1/3/4/5/134596284/7578356.pdfIn PDF document text
    • https://xekukagakodepa.weebly.com/uploads/1/3/3/9/133999272/09844fa8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387241/normal_6023fffcd0c03.pdfIn PDF document text
    • https://cdn.sqhk.co/lewenowaxer/gediehe/s8_super_slow_motion_960_fps.pdfIn PDF document text
    • https://rugepokowefi.weebly.com/uploads/1/3/5/2/135294276/8121338.pdfIn PDF document text
    • https://cdn.sqhk.co/rukububibon/Q4SRege/jukevom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/kung_fu_panda_3_kai_weapon_name.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_off00011ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC0 6100 bytes
SHA-256: 834adfb2dd344b680cb6ff20ef1b4ada2ed07c44196da17f3a4edd964db51898
font_01_sfnt_off00012f82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F82 11844 bytes
SHA-256: 906ac05da205dfa1d8ab5f0336afd756665549d2820d316470c8ec8befdd3c41

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