Malicious PDF — malware analysis report

Static analysis result for SHA-256 480c11848cf246fc…

MALICIOUS

PDF

73.0 KB Created: 2021-03-01 09:36:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: efd1ad4820529f4295afd2cb511729bc SHA-1: f67f6cc252118a5bd9f21a23a3bfaf26896d96a5 SHA-256: 480c11848cf246fce7f0ad11ebb3fd8acf60bb29874e62f8872449c19ecdf3bb
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://jumiwimov.ru/wix?keyword=number+system+worksheet+for+class+2 PDF link annotation
    • https://mewupevubuk.weebly.com/uploads/1/3/5/3/135387541/mevigutuwazobujes.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/japelokafijarokotulepuxi.pdfIn PDF document text
    • http://vuwefedope.sportsontheweb.net/xepajazufexaxedovorube.pdfIn PDF document text
    • https://kiniwotonupit.weebly.com/uploads/1/3/0/7/130776343/327261.pdfIn PDF document text
    • https://lukadivosegiga.weebly.com/uploads/1/3/4/6/134679105/a5d1c456d46021.pdfIn PDF document text
    • https://zajutarox.weebly.com/uploads/1/3/0/8/130814803/laletawitap-ralamirim.pdfIn PDF document text
    • https://mafenipo.weebly.com/uploads/1/3/4/8/134879688/8777373.pdfIn PDF document text
    • https://satufimitu.weebly.com/uploads/1/3/4/7/134715308/sadadit.pdfIn PDF document text
    • https://nefolebar.weebly.com/uploads/1/3/4/4/134400051/relixav-nejufos.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/lovomijelun/sutesula.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/20391073996.pdfIn PDF document text
    • http://gozudivigel.epizy.com/31711352069.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/childrens_health_defense_board.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/2340394880.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/64984300728.pdfIn PDF document text
    • http://rodaselawowov.rf.gd/photoshop_free_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/subway_allergen_information_uk.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_off0000df92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF92 5620 bytes
SHA-256: 7a2c89b7fcc16be9a8242a034906a86c492fb367d056676450f3e2157f4a9d72
font_01_sfnt_off0000f2a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A5 10644 bytes
SHA-256: b8f8e074ecebede3149cccd5f81156636aa963b70eb9f15738aba983a4a1bb15

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