Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d01a7819979f930…

MALICIOUS

PDF

73.2 KB Created: 2021-02-15 09:58:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c1efd8501afe7d1919dbc33056938e4d SHA-1: 8ec9f3311d658f3e37c636177199993d85a9a262 SHA-256: 6d01a7819979f930e4979febcc2aa91a78f99d4089b88cdc69888f6b873a3265
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://jacksth.ru/wix?keyword=calculating+speed+velocity+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379370/normal_601765c16d050.pdfIn PDF document text
    • https://xanusikufugab.weebly.com/uploads/1/3/4/3/134371049/vitejapupaguvov-mizuvoref.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464995/normal_5fe81838eeea3.pdfIn PDF document text
    • https://nozonefabizeg.weebly.com/uploads/1/3/0/9/130969368/rubelevobigubax-tuvodiwijivetit-vulefezop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451756/normal_5ffd2a9e3b82c.pdfIn PDF document text
    • https://mikedexe.weebly.com/uploads/1/3/1/4/131452733/godetita-dikov-xoxijadile-wugilon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479439/normal_5fc752b5b5a1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369519/normal_5fcef59b2d3ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450639/normal_5fdfac2c7c7e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490746/normal_60243115b3472.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kowefejarozop.epizy.com/lagu_busta_rhymes_break_ya_neck.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/50336141557.pdfIn PDF document text
    • http://wosotufozutula.epizy.com/4752933481.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/translate_google_app.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/railroad_retirement_board_form_aa-_1.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/wawad.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/hungry_shark_world_map_guide.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_off0000d5b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B9 5560 bytes
SHA-256: a9c84a259d188de6f24a145ba539e668617afda9513e3fd6989c01626deb0bb1
font_01_sfnt_off0000e8b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B0 14304 bytes
SHA-256: 3855959bdc883220c4dbcc6e3ee0a660813a5249b8240ebdf41090b944605c07