Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c8206e376700b86…

MALICIOUS

PDF

71.3 KB Created: 2021-02-07 03:38:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f8a249f9b852fa6ded20c1921165e9e3 SHA-1: 147218c2a081f3129be371a16f81dceb2986cbf8 SHA-256: 5c8206e376700b8698f025ed95202167c76a47bec6b850a6b1a596ba13a09356
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/aws?utm_term=leeland+way+maker+piano+sheet+music PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467926/normal_5fe8e6cfb6451.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417653/normal_5fe0d6e4f0251.pdfIn PDF document text
    • http://thailandlove.site/trucks_off_road_mod_apk_obbvrjb0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450634/normal_5ff5adb2cf377.pdfIn PDF document text
    • https://motanaweda.weebly.com/uploads/1/3/4/3/134316912/kagifa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464078/normal_5fdf7850753c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474191/normal_60018a8c5ff9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459479/normal_600b4b2818c27.pdfIn PDF document text
    • http://francobusiness.com/smiley_face_textzwj5q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413563/normal_5fdaedc422e5f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479213/normal_5fde3651d8e6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413719/normal_601744f6701c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445320/normal_5fe8d312b1455.pdfIn PDF document text
    • https://luwusimoxoxaxa.weebly.com/uploads/1/3/1/4/131453453/bejimet-lazozalefanokef-rodiburidegudi-widepedegejoz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374953/normal_5ff08cfbeea6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449603/normal_5fe0206a91a30.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368503/normal_5fdde57dd0756.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369522/normal_5ffe28f7e2042.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_off0000da4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4A 5512 bytes
SHA-256: 33a11c9288d833b62e75f40d827691ca836d5caa9fd3e73841bd84fddd5229a2
font_01_sfnt_off0000ecfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFC 10256 bytes
SHA-256: bb2371112226a302ce0a62362e17f0c69ce55769b2c9d16115889a449009c268

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