Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd9d0481cc1e8fe…

MALICIOUS

PDF

78.5 KB Created: 2021-05-12 00:58:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: f602401c684e9d8ffdb60e7b750b9734 SHA-1: 52504274ff96c4b3a0a97d4982751aea1536caa8 SHA-256: ddd9d0481cc1e8fec6547bd7466e040ebf9c2f8014b72eb2caf5a603c7e323f3
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to disposable hosting or known malicious redirectors. The document body, though heavily garbled, appears to be a lure for movie streaming, which is a common tactic for phishing or malware distribution. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=ver+los+juegos+del+hambre+sinsajo+-+parte+2+completa+en+espa%25C3%25B1ol+repelis In PDF document text
    • https://gixefizavemo.weebly.com/uploads/1/3/4/1/134108956/momaxupifinemapot.pdfIn PDF document text
    • http://novofikupeneda.mywebcommunity.org/literacy_skills.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/03dsnje/ultimate_combat_kung_fu_street_fighting_2020.pdfIn PDF document text
    • http://airbin.top/73819238948ffnmf.pdfIn PDF document text
    • http://zujejilolo.scienceontheweb.net/8208549154.pdfIn PDF document text
    • https://safejabev.weebly.com/uploads/1/3/0/7/130739713/6264160.pdfIn PDF document text
    • https://kipowiginudi.weebly.com/uploads/1/3/1/3/131383469/pinesisuvid.pdfIn PDF document text
    • https://cdn.sqhk.co/wirowanorax/RgejhDu/hocus_pocus_witches_brew_shirt.pdfIn PDF document text
    • http://fipizilemuwob.medianewsonline.com/vajedopoduborus.pdfIn PDF document text
    • https://cdn.sqhk.co/mekurapiw/gfiiJ5r/clinique_city_block_purifying_charcoal_cleansing_gel_sephora.pdfIn PDF document text
    • http://rupiwot.getenjoyment.net/alter_ego_1_hachette_free_download.pdfIn PDF document text
    • https://vixevugipun.weebly.com/uploads/1/3/5/3/135327752/fixake_webagetaputura.pdfIn PDF document text
    • https://kowezuvive.weebly.com/uploads/1/3/4/6/134603832/zawadugexu_gevigefekof_bilamo_pekafinoxobid.pdfIn PDF document text
    • http://zagejudivavi.sportsontheweb.net/fagutosadimuliroxowarirel.pdfIn PDF document text
    • https://cdn.sqhk.co/nupozifulija/JjiibkY/safufolulox.pdfIn PDF document text
    • https://cdn.sqhk.co/merabuvi/B682gh9/beef_hobo_packets.pdfIn PDF document text
    • http://thedouche.xyz/755370329368jeg3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/405fb28b-ed37-4213-9e2a-7ae0e155e5db/one_punch_man_season_2_anime_list.pdfIn PDF document text
    • https://5ce19dfa-329f-495d-88d1-e1e7834d9072.filesusr.com/ugd/d902bb_f5bc288cdf694ab5b211f6e62e2ca9da.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/76b1090f-8bfe-4216-ae8d-725c0a5cf53c/76753892474.pdfIn PDF document text
    • https://67dbe094-6b68-4a2c-870f-9bd980043d88.filesusr.com/ugd/cff74a_1357bac137154da69396f217f1118d02.pdf?index=trueIn PDF document text
    • https://f0198b83-f3fe-41b4-8315-bacd7eabb238.filesusr.com/ugd/2b3f46_6b7a24f0dfa1482092f1b20ca9a8ebf2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bba2f35-a59e-4e31-a5da-2bcbd3bc7a32/6771513673.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_off0000edef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEF 6044 bytes
SHA-256: d103c90fe45c2b468035f3f4f5f3ca315037ecd44b40efb9da4418b4219f5769
font_01_sfnt_off00010221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10221 12032 bytes
SHA-256: a2a80d1b793380bc07323886ff48b3e757d662de19515c1daef947015ef597a8

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