Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2455c4dad16fdd4…

MALICIOUS

PDF

72.4 KB Created: 2020-11-24 07:35:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 90b3eed11a9ba9d02bc19aa6032c3b8f SHA-1: 4a006f94229da6647ce63a2f6f7aacb8a10cfbf6 SHA-256: c2455c4dad16fdd40e4acd5a981b4a2dbe4bea915e7536752b826264e9ccdf5d
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffset.ru/123?utm_term=marvel+heroic+roleplaying+character+sheet PDF link annotation
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/rexoriluta-povak-kolabagivaxir.pdfIn PDF document text
    • https://wajativakol.weebly.com/uploads/1/3/4/7/134749030/setez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5f8e401b0279d.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/7b90daf6-869b-4a5b-9d95-98779f0596a6/13294835692.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a117b972-50e6-4ee3-9edb-a7618e03e304/candy_bar_personality_traits.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/level_up_bonus_super_mario_rpg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d754b37d-1290-4ef8-aa1a-13e59701eb2c/53496569554.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b836ab69-f711-4d27-af14-586b469e2d77/xufokowiwanufokojo.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/bojowopapadajidubikop.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/visewarupesu.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/70197851843.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/rozovupivujumosekigokiwo.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/krunker_io_unblocked_games_76.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/635450d5-a6bf-4593-9b59-0b742771182b/37941960365.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_off0000dbf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF0 5364 bytes
SHA-256: 2d463839b8e74b5cfa8a4407bb92f6aea85632a3c902e819026c6fc688e7b0b8
font_01_sfnt_off0000ee42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE42 12296 bytes
SHA-256: 406b997c24ed0207ddedc0fd516230cc71798e7f9375ccbcaae32441b54a48d6