Malicious PDF — malware analysis report

Static analysis result for SHA-256 51eb4385944ef658…

MALICIOUS

PDF

74.0 KB Created: 2021-04-01 08:10:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 5020015af7cb03bacd369ca301d50da0 SHA-1: ceffbc0e19781d1b4c94e62dc5ec9b2c61a4d19e SHA-256: 51eb4385944ef6588bce36da380a5a1574eaa77f03b81583226272ebe2b3a2f4
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious. It contains numerous embedded URLs, with one prominent URL pointing to 'jottigo.ru' and a suspicious 'utm_term' parameter suggesting a phishing lure. The PDF's structure and the presence of external links indicate it's designed to redirect users to potentially harmful content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jottigo.ru/123?utm_term=compliance+internal+audit+report PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370273/normal_6062c3c4365e6.pdfIn PDF document text
    • http://studytogether.fun/mspy_apk_free_crackedub1hr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393179/normal_5fef600e7f202.pdfIn PDF document text
    • http://evgeniy-semenenko.ru/33985162094du0o3.pdfIn PDF document text
    • http://ogranicbio.space/how_to_use_the_color_wheel_in_photoshoplf2jr.pdfIn PDF document text
    • http://7lessons.space/ruxivusj675h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374188/normal_600f4e37b58b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381534/normal_604218e7072b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409103/normal_605807df8889c.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeforms.com/niwolz0hft.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465259/normal_5fdaf208550cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453888/normal_5fccf36ce6592.pdfIn PDF document text
    • http://trokot-online.xyz/613855853820mgp4.pdfIn PDF document text
    • http://winfreeiphone.xyz/69624609218jhle.pdfIn PDF document text
    • http://itravelgr.com/5374268993980jkg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370740/normal_603586a591388.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/42422f2c-e428-429c-bde4-bb7e13894752/graco_travel_lite_crib_mattress_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b25f922-8752-4d6c-97de-0f39acbf7420/koxuzikotuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6964cbaf-5967-48b3-94ed-125a623cd342/85151777439.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db4807fd-07a5-473e-9de8-96ce9198c857/law_books_for_sale_in_pakistan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f95499b-fa65-4d86-8e3f-275770f139a1/40349265574.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/806c316e-17c2-4fd2-805f-166f5d4cd3cc/how_tyson_make_chicken_nuggets_like_kfc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7688786b-2b04-4810-aae0-4a9e32bcda9f/pagulisiwi.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_off0000e6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D1 4948 bytes
SHA-256: afa626c9831e43fd309dd47a08846ad024cd3bbc3074d8c7003df95ebbf79ad1
font_01_sfnt_off0000f783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF783 10368 bytes
SHA-256: 839a02f5813c975349b58b6799982a3d3bfc240550b46387da0174c369e9c731

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