Malicious PDF — malware analysis report

Static analysis result for SHA-256 708f1c9a269a5991…

MALICIOUS

PDF

75.5 KB Created: 2021-01-31 23:52:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 974753799f703b8695849092393d09a0 SHA-1: 3fcd67678216b6d3e45dfa6d07a27a3f25e7ad82 SHA-256: 708f1c9a269a599118623ce3437895f4cbfcfbe7c574a0214cf56c35d91caed5
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://jottigo.ru/wb?keyword=jump%20rope%20calories%20burned%20per%20hour PDF link annotation
    • http://bilabugova.iblogger.org/asymptote_examples.pdfIn PDF document text
    • https://xasukibumit.weebly.com/uploads/1/3/4/7/134749231/868276.pdfIn PDF document text
    • https://xomunulozesini.weebly.com/uploads/1/3/4/0/134018183/2581511.pdfIn PDF document text
    • https://jurivulanikep.weebly.com/uploads/1/3/4/5/134525456/cf0461afaf71.pdfIn PDF document text
    • https://zejobivajetipud.weebly.com/uploads/1/3/0/7/130740466/9753831.pdfIn PDF document text
    • https://tejukikefuxod.weebly.com/uploads/1/3/4/7/134703803/8ff93d38c62.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475586/normal_5fe50e95e6372.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461245/normal_5fdfd480b928a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nigojelur.epizy.com/carti_beletristica.pdfIn PDF document text
    • http://benibabu.rf.gd/getuvuvugosarivemisaxesan.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/social_media_flat_icons_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/blank_political_map_of_europe_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/fiwab.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/fokotusezinuvilagevu.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/wakesiriti.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_off0000eb35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB35 5444 bytes
SHA-256: b71f69eae75ea73df579fd784f172e5980b1a1af34f64ca52e554ff5faf867b7
font_01_sfnt_off0000fd7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7A 10356 bytes
SHA-256: 809467d005a8ab38595f84f3df9446332a08f1131550def09c2ecec4a25abd0c