Malicious PDF — malware analysis report

Static analysis result for SHA-256 16d6eecdd8aaaf77…

MALICIOUS

PDF

80.2 KB Created: 2021-03-07 10:04:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 601f1d62f106ab19da2ad1ffe5f72622 SHA-1: 451e5d6aaface8556b813e22152b13d0dfe7e4b0 SHA-256: 16d6eecdd8aaaf7782f123d3060843df4bac88b9fedd5fab4ff2580bd9a9b71d
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains metadata related to PDF generation and potentially search engine optimization terms, further supporting the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://leonvi.ru/aws?utm_term=how+long+to+cook+steak+on+lean+mean+grilling+machine PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4394068/normal_6031b3a65a8bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402503/normal_5fe516a7f16f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_600a5718cbb5c.pdfIn PDF document text
    • http://penageli.getenjoyment.net/a_series_of_unfortunate_events_cast_first_movie.pdfIn PDF document text
    • http://kixiwogazu.sportsontheweb.net/how_to_draw_a_simple_girl_figure.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379855/normal_5fe30902f1ca5.pdfIn PDF document text
    • https://cdn.sqhk.co/furafurume/MgcMxWw/mini_golf_mini_golf.pdfIn PDF document text
    • https://cdn.sqhk.co/rureroso/haFgcRc/4542529651.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374196/normal_602b2d3506591.pdfIn PDF document text
    • https://cdn.sqhk.co/xogixute/ijidian/gidimugimirizubos.pdfIn PDF document text
    • http://vodabutopidaru.getenjoyment.net/hebrew_greek_keyword_study_bible_nkjv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453908/normal_604189a3708ea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c480cc3d-c044-45b7-a7fa-747782367dcd.filesusr.com/ugd/a26f59_ea151c80a6e04b149c1432a7b3cb5a26.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a966e166-5c68-4704-9c3c-a796da076808/7360984327.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/915683e6-13c2-41c6-8645-cabe79dc265f/can_you_feel_what_i_feel_lyrics.pdfIn PDF document text
    • https://c2267750-1f6d-4c2f-944a-eb302c7f07d7.filesusr.com/ugd/93971e_e701502a2d764ed3bdff745730121b89.pdf?index=trueIn PDF document text
    • http://bototiluwoge.atwebpages.com/23548942650.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b107fe1-c2a2-4989-9f08-4ace4845fc66/how_to_put_a_taurus_g2c_back_together.pdfIn PDF document text
    • https://154530d8-637b-49d0-b90a-43bf07a176fb.filesusr.com/ugd/59359a_1e20ff765f874c798121a0c93687933a.pdf?index=trueIn PDF document text
    • http://zijiwaras.onlinewebshop.net/fewoxisezivazekaburis.pdfIn PDF document text
    • https://3633ae4e-9acc-45df-885e-1bfa1481cb44.filesusr.com/ugd/e73054_fcbdf8b16d11490e9eab5ee93fc63fdc.pdf?index=trueIn 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_off0000fb8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8D 5332 bytes
SHA-256: af1b44b0d608941d4a9341a2f81adc9c48b2469e6eac4b54448d8f187c03c625
font_01_sfnt_off00010d98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D98 10900 bytes
SHA-256: d854cc51ca8a46c219b13fa00b01230e7961ba7770dcc67a215de6490dbc3691

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