Malicious PDF — malware analysis report

Static analysis result for SHA-256 d04bea7e3d1d61fa…

MALICIOUS

PDF

70.2 KB Created: 2020-11-13 15:39:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f2240d7d23e7203037a3589019a46f02 SHA-1: 16e604a51a751529e4f8b4e4493c8bfa091d15f0 SHA-256: d04bea7e3d1d61fae62fdd6f83bc1d86295a0167e5ab07b91bc7e6d72fec0009
214 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm designed to manipulate search engine results or redirect users to malicious content. One critical heuristic identified a link to known malicious redirector infrastructure. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://gettraff.ru/aws?utm_term=ielts+listening+answer+transport+survey In PDF document text
    • https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/legavujodigimofurox.pdfIn PDF document text
    • https://biwiporiv.weebly.com/uploads/1/3/4/6/134620494/mawutuxixikitidus.pdfIn PDF document text
    • https://mitogisavubok.weebly.com/uploads/1/3/4/0/134019676/feloruwuxukedoj.pdfIn PDF document text
    • https://zizukomeluze.weebly.com/uploads/1/3/4/5/134582384/xurubuninibe.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/fc67d88ecad56f.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/5789615c-ae0b-4287-b30c-b214237d58ab/idylis_portable_air_conditioner_manual_530393.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff5e212b-151b-427f-8fb6-2d8c65e224b9/kamijoxinaxeduwejer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05f7f82b-bc94-4b77-87ff-9709eed452d1/daxajot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bd82217-ed53-4542-babf-5ea7845543a3/jepuxunajimamal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93eedbe0-9a3f-4e3b-9682-4b20f9b81ec8/61636530074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7008eb3-b145-43b8-85ac-350dc2e2788d/mt_kisco_chevy_used_cars.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3477367-3c05-49e0-9fbc-051c57358638/slither_io_hacked_apk_mod_menu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2409007-10d2-4615-9b9e-507898d1690f/685951242.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_off0000d853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD853 5176 bytes
SHA-256: f2938dd4e2ef19202806ff68e3d340ad83c8ea61d6896a738c9c324c82485bea
font_01_sfnt_off0000ea1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1C 9904 bytes
SHA-256: 26a21ae9a5e5451ede8f518e771620647925420e95302137ae8289cd69f89b14

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