Malicious PDF — malware analysis report

Static analysis result for SHA-256 f519d6e97a72337d…

MALICIOUS

PDF

74.6 KB Created: 2020-11-11 10:14:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: a7cc17ff74e563928e855a8b6e3638c1 SHA-1: 2f426316c6ac83367e05911b00fe41694cc388fc SHA-256: f519d6e97a72337de40d4e5cd2c4c7337911e1b70039c16a4bd1f2cf37a4b684
254 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/aws?keyword=hubley+toy+price+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387718/normal_5f9be7a36fb69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404292/normal_5f9c376791e6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f873e84dd964.pdfIn PDF document text
    • https://jixiriramoke.weebly.com/uploads/1/3/4/3/134320492/jerozavidinuk_soleju_rujudezazu_tesomagiluf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477620/normal_5faa88953a078.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450506/normal_5fa7de23b65e6.pdfIn PDF document text
    • https://bokasopuvozanib.weebly.com/uploads/1/3/4/3/134319525/wabawopove.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387226/normal_5f8f494b839fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366358/normal_5f9cf98f3c047.pdfIn PDF document text
    • https://nabisipiguges.weebly.com/uploads/1/3/4/4/134432296/sizugefumu.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/fekazudabo/70666546841.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/50707409375.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/dadugomitemaboberotesopup.pdfIn PDF document text
    • https://s3.amazonaws.com/sibenuvokiwuz/59191366112.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_off0000e663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE663 5056 bytes
SHA-256: 4fa11feeeeff13a21eb291a437127253077653dde9408bd41c451ed84e920791
font_01_sfnt_off0000f7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A8 11052 bytes
SHA-256: 937a803aea004398c89ea3df694a906808981c6db28fb7a9c98b59027c4bffbb