Malicious PDF — malware analysis report

Static analysis result for SHA-256 8beeaa1e657e7d72…

MALICIOUS

PDF

73.0 KB Created: 2021-03-04 18:30:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 15ea3e280e8935fe8c868ecd20224600 SHA-1: e31e1173ea22f81de34b08db5bc16947966dfcc0 SHA-256: 8beeaa1e657e7d72e7f7d8cfb9f27b136bfe56e26448b988ac352cce53ef1bf0
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/award?keyword=indian+history+timeline+chart+in+hindi PDF link annotation
    • https://cdn.sqhk.co/mivesumor/hjfibM4/gawinilofutakeminuxulo.pdfIn PDF document text
    • https://cdn.sqhk.co/fefowofuk/1ghThjb/united_states_merchant_marine_academy_salary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417032/normal_603864c173c89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387420/normal_6038e3e546f5d.pdfIn PDF document text
    • https://liwavijej.weebly.com/uploads/1/3/4/3/134379327/dc6d0afbd118.pdfIn PDF document text
    • https://cdn.sqhk.co/tadanopi/Aiehbia/laxoze.pdfIn PDF document text
    • https://cdn.sqhk.co/gutejalajige/hcBgcia/wirubazomalakow.pdfIn PDF document text
    • http://nivunexodu.22web.org/how_to_conduct_stock_market_research.pdfIn PDF document text
    • https://cdn.sqhk.co/fiseguvugele/gcgghic/tukakobefuvunab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404512/normal_603e243e1d66d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369520/normal_6012c025be8b6.pdfIn PDF document text
    • https://cdn.sqhk.co/butaliwe/hejcTgi/roller_skate_3d_print.pdfIn PDF document text
    • https://cdn.sqhk.co/dukasavubu/ifeYnAH/68929830887.pdfIn PDF document text
    • https://tunibedexorole.weebly.com/uploads/1/3/5/3/135350281/4157d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468294/normal_6010470066d6c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://zozemuki.rf.gd/febedojipitow.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_off0000d49a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD49A 5216 bytes
SHA-256: beab6b3416b1d5acc7f7e16538c2c49b53957674358240855c4ec2bfe6f0329e
font_01_sfnt_off0000e633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE633 9904 bytes
SHA-256: 53829c5bbe8e5a736df0b26de6038f972930cf0fa2f3601e844bef8fdb018455
font_02_sfnt_off00010868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10868 3652 bytes
SHA-256: ac11fedb49932e5e5a1dd1c39f4f6a688f98ece7083720be7af47229ea8b4d34

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