Malicious PDF — malware analysis report

Static analysis result for SHA-256 17cfdf73845fc6b7…

MALICIOUS

PDF

71.8 KB Created: 2021-02-26 05:47:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 9054e30fa17c99cd6268a72b077ab67c SHA-1: a22f2afd6261c630f1efb36bf5520b3ad163986e SHA-256: 17cfdf73845fc6b7268734f627ebfb67136e969f25ed75fc955be1f1dfb2e20e
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://jacksth.ru/wix?keyword=the+oxford+solid+state+basics+simon+pdf+download PDF link annotation
    • https://cdn.sqhk.co/bexoninodag/ghhhDO1/strikeforce_kitty_league_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482863/normal_60120a6951588.pdfIn PDF document text
    • https://puxezemugip.weebly.com/uploads/1/3/4/3/134311794/06e4adb69.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404984/normal_5fdf318b91755.pdfIn PDF document text
    • https://cdn.sqhk.co/tavanaru/hgc9nia/mobomumiwaguzo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454179/normal_60224b161a943.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446045/normal_601046bbcdb3b.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
    • http://nifopufu.epizy.com/candy_terry_southern_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/chloramine_formation_in_swimming_pools.pdfIn PDF document text
    • http://wijevisufa.rf.gd/bubeladodibixawawe.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/building_construction_book_rangwala_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/muxoboxebomino.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_off0000ce6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE6A 5432 bytes
SHA-256: 93e02dcc5176514e57d1672138f1413a6d187a9a47e98bdb0f09f858756709e7
font_01_sfnt_off0000e0cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CC 10336 bytes
SHA-256: 4f826b905a7b884a5abf4e59d49375bff2bc46ce5454bb7c5b8b99e6e56eb856
font_02_sfnt_off0001044c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044C 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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