Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdbbc8def9bc3f41…

MALICIOUS

PDF

70.9 KB Created: 2020-11-14 09:54:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: cd89c3c2d89d12830a8fd470196e2c57 SHA-1: 393cef40d764e8b0b7b5a29581960edc2773419f SHA-256: fdbbc8def9bc3f412cc5d68b141d399f02822f2b5d188c4f827ec84c9cdf5bfb
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://trafficel.ru/123?utm_term=english+angora+rabbit+facts PDF link annotation
    • https://fejufawos.weebly.com/uploads/1/3/4/3/134328201/5462932.pdfIn PDF document text
    • https://bijifejutumaxob.weebly.com/uploads/1/3/1/3/131381781/paterefi_werogi_lafumesob_rumixasenu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374840/normal_5f911b46a940b.pdfIn PDF document text
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/vozetovuxukelul.pdfIn PDF document text
    • https://mezuxanivatanid.weebly.com/uploads/1/3/4/4/134499991/8766563.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f95bff0-e82b-4d3e-9fff-29fb219dcd7f/mefubojulazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/152c901e-76c2-4980-b9bf-e99af5fc8806/26299284874.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/management_accounting_report_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c207f5c6-3800-4659-a26e-d21c8a441d85/54913929335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a021750-f86f-453a-b10d-ff728fa035b9/gixironukarotivetu.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/tadesoruk.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_off0000d99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD99E 5240 bytes
SHA-256: 46f09c141dd1d6c8c87069a25214c50abbf2745d7845bb9c6e60c86703ddd68f
font_01_sfnt_off0000eb70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB70 10364 bytes
SHA-256: 0c1b693753f6a5ffe61a5b46667ca8b1b03e5ca32da148d897781e5040fc4e26