Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cd92b84d236d866…

MALICIOUS

PDF

78.2 KB Created: 2021-03-19 20:56:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d07c4b16821db0527dc601dd4f6bc122 SHA-1: b1f5075536cda2f2b04f105a165592374a674d40 SHA-256: 3cd92b84d236d8663aafaa657909e06cdfda3b92c21c42a0915ea4a91f3b51ef
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, indicating it is part of a phishing or link farm scheme. It contains numerous external links, many hosted on disposable domains, designed to redirect users to potentially harmful websites. The document body, though partially corrupted, suggests a lure related to 'cloud computing benefits'. No scripts were extracted, but the presence of many external links points to a phishing or redirection attack.

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://bologen.ru/award?keyword=benefits+of+cloud+computing+pdf PDF link annotation
    • https://zufuleruzu.weebly.com/uploads/1/3/1/6/131637307/suleriwiwibir-togivorofitofa.pdfIn PDF document text
    • https://kewisivi.weebly.com/uploads/1/3/2/6/132681156/5851221.pdfIn PDF document text
    • https://fozumazajafipal.weebly.com/uploads/1/3/4/5/134588547/manivufad-dizimibe-tojigujobuno.pdfIn PDF document text
    • https://pixamowogiru.weebly.com/uploads/1/3/4/5/134590731/vakuxawen_sijemakan_xodarixawuketam_xipowupupafara.pdfIn PDF document text
    • https://gowobokibisalo.weebly.com/uploads/1/3/0/9/130969305/nakenavubawupe_xadosezelimel.pdfIn PDF document text
    • https://dobamadolexazi.weebly.com/uploads/1/3/4/4/134478964/4008790.pdfIn PDF document text
    • https://lijuvimu.weebly.com/uploads/1/3/0/7/130775306/balub.pdfIn PDF document text
    • https://wosuletoxo.weebly.com/uploads/1/3/0/7/130739711/04b28c63.pdfIn PDF document text
    • https://garowowo.weebly.com/uploads/1/3/6/0/136033653/kuwigi.pdfIn PDF document text
    • https://wuguruxozoza.weebly.com/uploads/1/3/4/0/134040539/javaxi.pdfIn PDF document text
    • http://funusamemis.22web.org/noxavadamimekosovo.pdfIn PDF document text
    • https://lodufifed.weebly.com/uploads/1/3/1/4/131411197/8238390.pdfIn PDF document text
    • https://xaxarudo.weebly.com/uploads/1/3/0/7/130740130/nupogunarujujuseli.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jakepejeto.rf.gd/video_converter_free_for_pc_offline.pdfIn PDF document text
    • http://lunufisisosixi.rf.gd/garfield_2_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90f85c92-6e1b-484b-8e1b-673ac162efa4/nclex_rn_question_and_answer_with_rationale.pdfIn PDF document text
    • http://bukumetaboxalo.epizy.com/extent_report_with_screenshot_in_selenium.pdfIn PDF document text
    • http://lopaxoreje.rf.gd/game_karne_ke_liye_kya_kare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50f1ea55-95d9-4d4b-a1b2-a9f9dec8856c/how_to_prepare_a_risk_assessment_form.pdfIn PDF document text
    • http://dakokaxawizepu.epizy.com/68553407652.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/983416bd-ef25-4232-b9a0-33bd5245a089/titan_440_i_packing_kit.pdfIn PDF document text
    • http://puxabilaxomim.rf.gd/zejobibogonerugok.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_off0000f5ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FF 5220 bytes
SHA-256: c3aa2a40828d6c65512f5366544810328d08cc4e644546dc7e634befbf5edba3
font_01_sfnt_off000107bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BC 10604 bytes
SHA-256: 05bf875d9a4efde2c77b4ce459e9e6e2ae23b57d34a1ebea360cb4ec3a8f0e02