Malicious PDF — malware analysis report

Static analysis result for SHA-256 52122287d4428843…

MALICIOUS

PDF

68.7 KB Created: 2021-02-22 07:14:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: a03ad36c27d60de2922b611b324a0a9c SHA-1: 4ec8193a65c6f8b2d847ab872a7d66dd3751859c SHA-256: 52122287d44288436a1d7fdc16e1d5ac4f3b7346b9663afc843dc1b4aa3c619e
196 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
  • 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://jottigo.ru/wix?keyword=ib+mathematics+sl+cambridge+answers PDF link annotation
    • https://xaminipa.weebly.com/uploads/1/3/1/0/131071220/2938843.pdfIn PDF document text
    • https://pokotozumunas.weebly.com/uploads/1/3/1/4/131453498/c0746689e295b7c.pdfIn PDF document text
    • https://muxuredoli.weebly.com/uploads/1/3/1/3/131380086/meboziparak-bebelamed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455370/normal_601f64c5c942f.pdfIn PDF document text
    • https://nenusisuma.weebly.com/uploads/1/3/1/6/131606583/nekopix_batusutex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415782/normal_5fdc694ce10ce.pdfIn PDF document text
    • https://xipasole.weebly.com/uploads/1/3/4/8/134853136/1609502.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486983/normal_601b425b46d43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489057/normal_6009a9c45878c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448347/normal_5fedcad2b5ad4.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/mukutud/latest_ios_for_macbook_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/savutevobululabuzolumi.pdfIn PDF document text
    • http://juvadapirepaf.epizy.com/lincoln_electric_weld_pak_180_hd_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/ariens_snowblower_manual_624e.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/9638114720.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/chili_s_chips_and_salsa_nutritional_information.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/adverb_phrase_worksheet_for_grade_4.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/fitted_carrycot_sheets.pdfIn PDF document text
    • http://fusuxitizubuka.epizy.com/islamic_names_dictionary_in_urdu.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_off0000cf64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF64 5520 bytes
SHA-256: 90e9a4bb45a186e3d34feca85d90c7f5ca9572242d9353a18423772daf602bae
font_01_sfnt_off0000e204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE204 10428 bytes
SHA-256: 306e520e70a71f9893c6ff6a91a89d9e2f7ad2f660feeab931dd36656711163b