Malicious PDF — malware analysis report

Static analysis result for SHA-256 e45f4b3893f78f0a…

MALICIOUS

PDF

72.1 KB Created: 2021-03-02 12:31:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: da65b27f76363504350a8eab5951d1bf SHA-1: 9b0b83d2700d9df9167c56e8d25f6b183b0d39e5 SHA-256: e45f4b3893f78f0a0ae0b1ea090bf54c820ab0ead95ba9973f53a573347f1d39
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/aws?utm_term=assassin%2527s+creed+valhalla+do+dialogue+choices+matter PDF link annotation
    • https://bolowotusupiwam.weebly.com/uploads/1/3/5/3/135300352/66ce985e0e70c.pdfIn PDF document text
    • https://mebevoluw.weebly.com/uploads/1/3/0/7/130739105/2df335321bdf4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417536/normal_5ffa8abbd5117.pdfIn PDF document text
    • https://sopaxibifezubin.weebly.com/uploads/1/3/4/6/134608036/xupuketureta-poxiwo-bireluxariwax.pdfIn PDF document text
    • http://popubim.iblogger.org/mutufolegenufawopojeguzew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489042/normal_6015de6356bab.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/nitajosasa/12531524272.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/hampton_bay_midili_ceiling_fan_replacement_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/87066479409.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/11924905407.pdfIn PDF document text
    • http://wixulolefafela.rf.gd/carnivores_2_free_full_game.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/forms_of_energy_ppt_7th_grade.pdfIn PDF document text
    • http://dudorotedebapoj.epizy.com/79045459445.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/doro_1360_mobile_phone_case.pdfIn PDF document text
    • http://xinasewaja.epizy.com/what_are_manipulation_techniques.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_off0000de51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE51 5436 bytes
SHA-256: 08896ada677e2077043e3f8d54748c7576dd474f3a560afec5919cc536d6fa15
font_01_sfnt_off0000f0ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AC 10148 bytes
SHA-256: 0a58e4a3cbade35aac814ec131acd461acd591ef019b7e1516ec002b7731b801