Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e39c16ac6e0c42…

MALICIOUS

PDF

80.3 KB Created: 2021-03-14 01:47:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 9963c3b3ecd05d5ea345881d7c87370a SHA-1: 9eca81dd19f7efcda093e9e000bcb66afb825bea SHA-256: 60e39c16ac6e0c42c0f3ef586f1f014cf2fad83aa00e1689a0ab6500e3eecd2f
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded links, with at least one pointing to a suspicious domain ('zajinet.ru'), suggesting it functions as a lure for phishing or malware downloads. Although no scripts were directly extracted, the PDF structure and link farm heuristic point towards a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://zajinet.ru/award?keyword=acuerdo+comercial+entre+empresas+pdf PDF link annotation
    • http://tareworig.mywebcommunity.org/47347872810.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370304/normal_6035ca5d613e2.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/10265138564.pdfIn PDF document text
    • http://trikolor.site/90285397417m6b0i.pdfIn PDF document text
    • http://exampl1214.com/star_trek_the_next_generation_season_2_episode_6ivbzf.pdfIn PDF document text
    • http://raffle.website/97140320751ykipy.pdfIn PDF document text
    • http://urott-hu.com/womuxewilukuwiwadi5ynu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475562/normal_5fcb1bea5403a.pdfIn PDF document text
    • http://rivepozepuxar.mywebcommunity.org/15685450851.pdfIn PDF document text
    • http://sendgrid-de.com/gifevijururigaduxoxulob61n9j.pdfIn PDF document text
    • http://nezowigivomi.scienceontheweb.net/arabian_nights_full_stories.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456676/normal_60432aba2dbeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502493/normal_6033ea6e2583e.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/91b31413-f32c-4a90-8bf5-89090a27251a/how_to_write_in_an_engineering_notebook.pdfIn PDF document text
    • http://dipagepe.atwebpages.com/jamiwiwuxuzofolarizafilum.pdfIn PDF document text
    • http://karokifewugasuz.onlinewebshop.net/80661130812.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/xugitemusuzik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/264541e2-3acc-4c67-816b-34897ece7626/dinulafor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/671134ed-8c38-4d11-9f7a-3f0fda9c40c6/73050555386.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ec34541-55cd-4cc5-86cf-fdf83484bc82/best_f2l_algorithms_j_perm.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/uppercase_cursive_handwriting_practice_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/integral_calculator_with_steps_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/fupugipafuzu.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/bifajadewojewunumaz.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_off0000fbb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB8 5288 bytes
SHA-256: ee55a1cf9352baa989308fa018ff01e852d71ab32f745bd33d4364efcde9efeb
font_01_sfnt_off00010d9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9A 11552 bytes
SHA-256: 47e11d61c1c24e12b19f9ff33924b06412c132d29e1868663e9d4ecefacf6a36

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