Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1189dfb40598321…

MALICIOUS

PDF

67.7 KB Created: 2021-02-08 15:02:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e6db20cb8b69cf0a45fd0e3a5a7d7199 SHA-1: c7a6ecddd779950c8d1f8baeb8f028966337cabf SHA-256: b1189dfb40598321da66ab24372134def49bfaf24758ff189e04b0a5f38e9a8a
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://seumenha.ru/aws?utm_term=clarice+bean+spells+trouble+worksheets PDF link annotation
    • http://kvrovk.xyz/lipulekarudoluxupeliz8m1vs.pdfIn PDF document text
    • https://xapodopuk.weebly.com/uploads/1/3/1/8/131856257/goxur.pdfIn PDF document text
    • https://viradigoposexa.weebly.com/uploads/1/3/4/3/134383508/6165676.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449788/normal_5fdf5a473ced7.pdfIn PDF document text
    • https://xowimigijik.weebly.com/uploads/1/3/1/6/131637135/f87763091.pdfIn PDF document text
    • https://nenubijul.weebly.com/uploads/1/3/5/3/135393623/samelekogixovuf.pdfIn PDF document text
    • https://rubexanow.weebly.com/uploads/1/3/5/3/135346757/684269.pdfIn PDF document text
    • http://zzzmmmmejjj.space/166634049989rc6s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410702/normal_5fdf0e6c87ffc.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/fewifuwu/vidaxoga.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/27092820501.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/arinc_429_protocol_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/rutogodadid.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/butemidobetuxasutid.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/jusego.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_off0000ccd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD1 5220 bytes
SHA-256: d9e06666c8d928978e9572beb4e9b136efb844a94ee0c87d94d2c13ccb2457ca
font_01_sfnt_off0000de94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE94 10396 bytes
SHA-256: 6d329dd41cd1b52f2613a39de40f525fa8d73c02181d5db72371009a37c52156