Malicious PDF — malware analysis report

Static analysis result for SHA-256 2695bbf5a7516c72…

MALICIOUS

PDF

106.7 KB Created: 2021-03-02 00:30:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 68f8f6134675fe3d8a14e2a7af41c89a SHA-1: dc26d7d4a8fe8e5c0b8c04e3d324ff7877e3edb2 SHA-256: 2695bbf5a7516c72b325eb3ede5d4652e6e0b5e95598c11582d04182e31d5c9b
166 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including PDF_SUSPICIOUS_LINK_LURE and ML_NYX_PDF_MALICIOUS, indicating malicious intent. The presence of numerous embedded URLs, some leading to suspicious domains, suggests a phishing or malware distribution attempt. The document body, though heavily corrupted, contains text related to 'Bram Stoker' and 'Dracula castle', possibly as a 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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://botokaw.ru/strik?utm_term=bram+stoker+description+of+dracula+castle PDF link annotation
    • https://cdn.sqhk.co/zowonefaso/bmvghi7/gafidomovugogasidojigafo.pdfIn PDF document text
    • http://fajamad.mypressonline.com/xafunububevi.pdfIn PDF document text
    • https://cdn.sqhk.co/xuluriwu/Wujigfd/mad_max_fury_road_movie_cast.pdfIn PDF document text
    • http://tertov.xyz/gunot3a2oz.pdfIn PDF document text
    • https://cdn.sqhk.co/madufuxenuw/8jgmibA/xezuladukexa.pdfIn PDF document text
    • http://lnstagram-support.live/69727621178klel.pdfIn PDF document text
    • http://cabinetsapp.xyz/ccleaner_pro_full_keywuv4r.pdfIn PDF document text
    • http://gmetry.online/marriage_not_dating_legendadof3562.pdfIn PDF document text
    • https://cdn.sqhk.co/nosamese/ijJjOhj/bosasudeluxutana.pdfIn PDF document text
    • https://cdn.sqhk.co/jurugaguvedu/boghmxg/std_10_science_chapter_1_gravitation_important_questions.pdfIn PDF document text
    • http://biwiroxefamir.mywebcommunity.org/interior_design_canada_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kadoxosin.atwebpages.com/najosogavafinete.pdfIn PDF document text
    • http://futikuzita.onlinewebshop.net/75816274959.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/95145859287.pdfIn PDF document text
    • http://jujobope.atwebpages.com/list_of_constants_in_physics.pdfIn PDF document text
    • http://tikomiwewo.atwebpages.com/simpson_pressure_washer_reviews_costco.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/zelanunigoropas.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00016bac.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16BAC 27640 bytes
SHA-256: b02a7f4842bb53b523bc407edbc70d00568f061a35bc098bb4fd231204beab71
font_00_sfnt_off0001327b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1327B 5416 bytes
SHA-256: c52e0daaf505c8277e6e7d23c2e2b57c99250bef53995a603b6601ed9060900e
font_01_sfnt_off000144d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144D5 12228 bytes
SHA-256: 0d301a9ffd9771bb66edb1a9ef79802854ee89f60bf50abb1a9036f6b2dc054c

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