Malicious PDF — malware analysis report

Static analysis result for SHA-256 1277b3067a5da4af…

MALICIOUS

PDF

84.4 KB Created: 2021-05-15 18:21:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 50ee35241c9c115772ed6f6098277a17 SHA-1: b981de0e9dedd672856de435020395292b209697 SHA-256: 1277b3067a5da4af46cb71b0a6d7331615014754154be5aec7d8a8190e1e8d32
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to distribute malware or phish users. The embedded content, though heavily obfuscated, appears to be related to search result lures, specifically mentioning 'the night manager season 1 episode 4 watch online free'. No scripts were extracted, but the PDF structure itself facilitates the redirection to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xajibur.ru/strik?utm_term=the+night+manager+season+1+episode+4+watch+online+free PDF link annotation
    • https://buronoveze.weebly.com/uploads/1/3/0/7/130739674/fuwevegosamivax.pdfIn PDF document text
    • http://kugaraginoja.mypressonline.com/iphone_5c_32gb_price_in_pakistan_2020.pdfIn PDF document text
    • http://wupemokabate.scienceontheweb.net/posaberapaku.pdfIn PDF document text
    • https://sevafigetof.weebly.com/uploads/1/3/4/9/134902911/nerov.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/thrustmaster_t-flight_hotas_x_button_layout.pdfIn PDF document text
    • https://xoxekoxezugox.weebly.com/uploads/1/3/0/7/130738790/3d8c5aa39ad.pdfIn PDF document text
    • http://watercart.ru/how_to_make_a_line_graph_in_excel_with_a_lot_of_datails1y.pdfIn PDF document text
    • http://idclick.cash/computer_ki_paribhasha_english_meinf3prr.pdfIn PDF document text
    • http://form-lnstagramcopyrightservice.com/learn_english_grammar_online7x3na.pdfIn PDF document text
    • http://fesurowejo.mywebcommunity.org/dinigafobugosuxorinobof.pdfIn PDF document text
    • http://smartcoin.design/bewejd0z84.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xezujuxoz/opera_browser_for_windows_7_ultimate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a4e0124-2dc7-44ac-924c-557b191e3768/how_to_repair_whirlpool_washing_machine_agitator.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/7868389114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa773d83-c840-437a-bb05-e368f66a45d3/zelilizefibasewalomajol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/395bd0bf-a7f5-4f45-b515-ec32d76e2805/sanunenixubunis.pdfIn PDF document text
    • http://panexorumilogim.myartsonline.com/25327007515.pdfIn PDF document text
    • http://wuxosalilujaza.atwebpages.com/19102897008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3971d2a9-1742-4d6c-90bf-df8ca5abf060/the_lion_the_witch_and_the_wardrobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcd3fbae-8acd-42a9-93d2-983078672ed6/81649751361.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/40k_gathering_storm_3.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB4 5540 bytes
SHA-256: 4c46bdee92f86a366de2fb02919851a52039142f1bb0160bbf4978fefa4d0d35
font_01_sfnt_off00010f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6E 11484 bytes
SHA-256: bb015615194ab6d713d26f4de89c728aaf5404932f93168a40a267f8dd19046b
font_02_sfnt_off000135ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135CE 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333