Malicious PDF — malware analysis report

Static analysis result for SHA-256 81e93976ace2a1c3…

MALICIOUS

PDF

71.6 KB Created: 2021-01-27 17:38:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 2bb2256a06065deffab4add54d0506ad SHA-1: 9e26ad9a4a7cf316e080b18d14a314cb5ed866c5 SHA-256: 81e93976ace2a1c3f119a1cf09e9b6e30fda25111565e8def4575c11d0e8dae0
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://jottigo.ru/aws?utm_term=folding+adirondack+chair+plans+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417659/normal_5fd8ee6480223.pdfIn PDF document text
    • http://fruits-summer.fun/gexusaworobutemiwezo9e0bt.pdfIn PDF document text
    • https://sowematawenuw.weebly.com/uploads/1/3/1/1/131164153/7163952.pdfIn PDF document text
    • https://lerofiputa.weebly.com/uploads/1/3/4/3/134367001/a5e5b1436498d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365606/normal_5ff9cf184f15a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502870/normal_5fc68c3522e08.pdfIn PDF document text
    • http://world-wildshop.com/kalina_girls_frontline1tx8b.pdfIn PDF document text
    • https://mibubibot.weebly.com/uploads/1/3/1/8/131871690/8b9f253cff6203.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473616/normal_5fd7f0edc0995.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404750/normal_5ff19447ecdfc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375095/normal_5ff430519c8dd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/hitman_blood_money_game_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/age_of_empires_ii_the_forgotten.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/imdb_terminator_dark_fate_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/ximonavedakudoreraw.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_off0000d9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FF 5436 bytes
SHA-256: 9878cb7dfc7156e4a45715b689b7d0052fdf72717bbe4ffd73576fc64560bb76
font_01_sfnt_off0000ec7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7C 10804 bytes
SHA-256: 1bf84d616c39858506e76858586d2f53f0a5a6ee3caa4111f5bfba361e651333