Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9af8205dbdde344…

MALICIOUS

PDF

77.0 KB Created: 2021-02-07 08:49:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 040e56fba41575b070d9220e062f7c16 SHA-1: bbe60957ed35f00949a3800a73dc7a43dd4dc831 SHA-256: d9af8205dbdde344729af22ec6f84eed214006d9c6f82392b8d72172f465eae7
244 Risk Score

Malware Insights

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

This PDF document was identified as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure and a large link farm. The document contains numerous embedded URLs, many of which point to disposable hosting or potentially malicious domains, suggesting an attempt to direct users to harmful content. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution lure.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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/aws?utm_term=pdf+file+online+reader In PDF document text
    • http://fruit-ita.fun/pokemon_xd_gale_of_darkness_download_gba84bhb.pdfIn PDF document text
    • http://ctuxuu.com/adolescent_psychologyfkeb6.pdfIn PDF document text
    • https://bufasijo.weebly.com/uploads/1/3/2/7/132740378/sozuvuwiputufun.pdfIn PDF document text
    • https://vidiwubiref.weebly.com/uploads/1/3/0/8/130874646/wofipijisuji.pdfIn PDF document text
    • https://laxuwipulave.weebly.com/uploads/1/3/5/9/135956831/figeponalupez_wawebefixisurak_nokusujowujega.pdfIn PDF document text
    • https://solawelosadi.weebly.com/uploads/1/3/1/8/131857655/6160708.pdfIn PDF document text
    • https://xavabakonoliwif.weebly.com/uploads/1/3/4/4/134477423/mokaruluwun-werekusizofitow.pdfIn PDF document text
    • http://kogiwonewaveg.iblogger.org/gdpr_data_protection_policy_template_ico.pdfIn PDF document text
    • http://world-wildshop.com/sebiximoreropugilyh42o.pdfIn PDF document text
    • http://maporirunigis.22web.org/true_believer_movie.pdfIn PDF document text
    • http://salonhq.xyz/50978516139iz84s.pdfIn PDF document text
    • http://fusitekive.iblogger.org/36130091578.pdfIn PDF document text
    • http://esparks.ru/xegoxojuxefipikege5x9.pdfIn PDF document text
    • http://blacktea.space/beauty_plus_camera_app_installd0iza.pdfIn PDF document text
    • http://lojotiwutorolad.22web.org/89567004209.pdfIn PDF document text
    • https://rezepurobej.weebly.com/uploads/1/3/5/3/135327696/d4c1ae24.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/fejififimaketo/21562344014.pdfIn PDF document text
    • http://tapavakagazu.epizy.com/whatsapp_gb_plus_apk_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/excel_macro_calculate_current_sheet.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_off0000e707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE707 4724 bytes
SHA-256: 01d88c9bda249989bdf13d058326aa5e725a0c5a8ca1defd1266fbee493ac167
font_01_sfnt_off0000f71f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71F 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off00010282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10282 10524 bytes
SHA-256: 7a9d2ea4fca3c9f6aad252e70ef6ee00722a2b046f3f72984259966c8dfedd7f