Malicious PDF — malware analysis report

Static analysis result for SHA-256 34a88892ed4e5a14…

MALICIOUS

PDF

36.4 KB Created: 2020-11-06 11:31:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 0ff21e3d4047fc93dbcda889531395bf SHA-1: 056dc0e0101cc7a9223bb11da700807f0f78ec2c SHA-256: 34a88892ed4e5a14fd9683f70af115a1b79c8d2ca06cbff6ea84089279abaef0
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafffi.ru/123?keyword=amazon+alexa+show+8+manual PDF link annotation
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/9dd1ece6c8d1a.pdfIn PDF document text
    • https://wenadowepafim.weebly.com/uploads/1/3/4/3/134314247/nirevagorenakiv.pdfIn PDF document text
    • https://pukotegifo.weebly.com/uploads/1/3/0/8/130874060/turixawonako_pufako.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/9cc0346c-66ef-4a0c-8c5b-6120f76a87fd/mining_stardew_valley.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/gesiburirovilirilawumafif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87bd209b-5eea-4d5f-bed9-5c278cbe7313/what_is_a_secondary_economic_activity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4f785ce-2edf-4ca3-8317-94fad56be78a/biochemistry_mathews_4th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ac33c66-9edf-44ae-8559-66dff965b44c/velofilodejajemafide.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/pojub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/771f0baf-967a-4571-9495-82e5df421d90/zesogorotiwev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f71d71d4-f5f5-4f13-98e7-f2077de9125c/hulk_wallpaper_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7188c759-7a85-4bd7-b465-b865cdb69e0d/42945387716.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6980ff65-6dda-4693-b383-b6e29448521d/2858054850.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0addf8a-2ebb-4387-a424-7da4e9a32460/miwukumajoxunotogade.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000045b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45B7 4976 bytes
SHA-256: 501d7e0368f07c4f47bd901dc4b90e3d4c205997c8db5631bd77db660d54c743
font_01_sfnt_off00005685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5685 9372 bytes
SHA-256: a1d21f54ae8c690b2ca7bb83082a6fa123b050d3660b4ef45f0641df8d3d4ebf
font_02_sfnt_off000076b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76B2 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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