Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e4fb76e37e35032…

MALICIOUS

PDF

64.7 KB Created: 2020-11-20 03:51:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: c91b8d9b47db68193cf3d79adb7078c2 SHA-1: 25a740a197bad47477013abd9e4253a3007234e7 SHA-256: 8e4fb76e37e350324e63f94bdbad1938e62d15452bc91650e1c9c3bb686741ae
254 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
  • 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://traffine.ru/aws?utm_term=royal+canin+persian+kitten+feeding+guide In PDF document text
    • https://xemupawiked.weebly.com/uploads/1/3/4/3/134321325/70cc204.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381090/normal_5fb712e3db346.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393018/normal_5fae27761b839.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385862/normal_5f95a23ab7fa5.pdfIn PDF document text
    • https://tuwoganerolet.weebly.com/uploads/1/3/4/6/134631505/1313541.pdfIn PDF document text
    • https://wavuvavezexa.weebly.com/uploads/1/3/0/7/130775629/7d693f9b48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370541/normal_5fa80d3b0b5a6.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/vakudawutab.pdfIn PDF document text
    • https://zopojidiluze.weebly.com/uploads/1/3/4/3/134361294/peweza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tadovu/jepura.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/kikeze.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b0d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0D3 5380 bytes
SHA-256: 55dc11551378389267eb94d2aad707a6f4cb62364183d5e27a52e70c6278c4fd
font_01_sfnt_off0000c333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC333 10680 bytes
SHA-256: 5a7b76f55c217ad7eeb7110b4ceabc286e5f19b9bcd9c4609aa36a9a20f33eb7
font_02_sfnt_off0000e7b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B5 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378