Malicious PDF — malware analysis report

Static analysis result for SHA-256 a630ae679ded46aa…

MALICIOUS

PDF

64.4 KB Created: 2021-02-12 09:37:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a82948bcc30c8859331acfa15985997d SHA-1: dd85dbc88eabe04d73e46baf874791c69feacb01 SHA-256: a630ae679ded46aac0b66e07c0cd1d227024ca398b3dec884e539a3c2dcd2890
254 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
  • 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://crophysi.ru/wix?keyword=fortnite+minty+pickaxe+code+xbox+one In PDF document text
    • https://wapofaxuza.weebly.com/uploads/1/3/5/9/135992917/newelosujosilaf_volavimivul_lerenesunatu_gedawunugelodu.pdfIn PDF document text
    • https://jedunifoxawixe.weebly.com/uploads/1/3/4/4/134458330/nemarutosu.pdfIn PDF document text
    • https://wadasazaba.weebly.com/uploads/1/3/3/9/133999184/1837608.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461509/normal_6007a50f578b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457272/normal_5ff81a6136cca.pdfIn PDF document text
    • https://bofejaximolapob.weebly.com/uploads/1/3/4/7/134751884/c1d98489.pdfIn PDF document text
    • https://fiwisito.weebly.com/uploads/1/3/4/7/134715438/f209f827d20.pdfIn PDF document text
    • https://mobajexiv.weebly.com/uploads/1/3/4/4/134455683/1554086.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483089/normal_5fcae9f77e68b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453889/normal_60174a4681a3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451025/normal_600f793473801.pdfIn PDF document text
    • https://wakepazatojux.weebly.com/uploads/1/3/0/8/130873951/1531478c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445106/normal_5fd067f7cb15b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370294/normal_600138cd75a4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5fd7183a15c77.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/nosepevozux/libro_catecismo_para_nios.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/fuxotugaxodoja.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/19257141520.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/regifesasenigajomu.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_off0000bf8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF8E 5340 bytes
SHA-256: a91f41ac8f6a7f0f054b0321a54b007b6bf1c2f6617fa098d7a2e36219d4b315
font_01_sfnt_off0000d1af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AF 10204 bytes
SHA-256: 69607bde3f36097f3371065f44c555e0f5f3b22763ff61fb51bc9308aeb3d634