Malicious PDF — malware analysis report

Static analysis result for SHA-256 759f2ef3ca698d5e…

MALICIOUS

PDF

75.5 KB Created: 2021-01-21 13:49:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: cebb69d0a697e314ae32bb46a84f54eb SHA-1: 439de84d4e0bf9279f39453e9bfc25f81029c7d7 SHA-256: 759f2ef3ca698d5ed2f3657e0097de056be8cd02d732e67a396d5ed48d97fbb9
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://jacksth.ru/wb?keyword=history%20of%20ancient%20rome%20pdf PDF link annotation
    • https://woluxubofij.weebly.com/uploads/1/3/1/3/131383763/dexor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369630/normal_5f8e055d08bb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408184/normal_5f941714c2ac9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381082/normal_5f98ef0317739.pdfIn PDF document text
    • https://dorigobumin.weebly.com/uploads/1/3/1/3/131384291/a44678d18a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417024/normal_5ff8cb476d2dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423454/normal_5fa4b5b2ac8bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381735/normal_5f8ce8e1d4bbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372080/normal_5fe80898e82f5.pdfIn PDF document text
    • https://nebuxegakox.weebly.com/uploads/1/3/4/4/134404726/8782678.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366302/normal_5f8abecd4ff91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368748/normal_5fc60669139a4.pdfIn PDF document text
    • https://wafulezejo.weebly.com/uploads/1/3/4/7/134748518/bakefusevasezi_sivowox_demozel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464542/normal_5fb98e2892dc9.pdfIn PDF document text
    • https://zuxomizo.weebly.com/uploads/1/3/2/7/132710603/tuzerodopogusebekeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389352/normal_5fb5ea194a4a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368223/normal_5f98789bf0a97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375886/normal_5f98c20d55758.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000eb08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB08 5332 bytes
SHA-256: 99d0665dbd2a46741c58a33f5d2f7c1469baaf72cb7f0aa9fc2bb515c709b38d
font_01_sfnt_off0000fd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1C 11004 bytes
SHA-256: 24c72a2db3ad15fa63ac952748349928fd18390d753b23b1382dc6e4bd322807