Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7eb292df443f612…

MALICIOUS

PDF

82.7 KB Created: 2020-11-17 01:15:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 5fb1523dbf0c1106d6d7c0f831c45d16 SHA-1: 84dcf41969ec640f920f76fb86d99b49437d2ce3 SHA-256: d7eb292df443f61217365d0ebe46b80ead961abb79d9eade1f67e0c0bc91f2c3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, with one primary malicious URL pointing to 'traffset.ru'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and extensive external linking suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://traffset.ru/123?utm_term=galaxy%2527s+edge+book+series+review PDF link annotation
    • https://palozemoxapido.weebly.com/uploads/1/3/4/3/134366311/muwuro-wumivir-puregejotagapi-gefajipaxawonu.pdfIn PDF document text
    • https://guvodirafed.weebly.com/uploads/1/3/4/4/134475496/8adb28eecda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wofaxil/44833832618.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/marketing_strategy_of_apple.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/ba_thesis_example.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/what_pov_great_expectations_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/ap_gov_court_cases_to_know.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/528cf554-5708-4a65-8131-d57c61276637/abdc_season_8_episode_4.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/riesgos_psicosociales_en_adolescentes.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/zolisoduzijalomumi.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/al_stohlman_belts_galore.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_off00010698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10698 5584 bytes
SHA-256: acd4148c6e573106c4d28df061a106c08ad3aca42c9bf46c4e993ba3c34b83c9
font_01_sfnt_off000119d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D0 10720 bytes
SHA-256: bd1382d583d781a0fb0befda30e55936a3993c11e251d9ab38594a082e1120bc

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