Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7081eda515d4940…

MALICIOUS

PDF

67.7 KB Created: 2021-02-07 01:51:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3fe9e5d08073b3856f45f9921ce0bf36 SHA-1: 0887d73e8a0f35c6ad13f6ba09b027811ba5e5f7 SHA-256: a7081eda515d49409c5811efeb469d570d41d659c11b8eeac2acf8ee65a772c6
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://baarspo.ru/wb?keyword=magic%20eraser%20background%20editor%20android PDF link annotation
    • http://trokot-roznica.xyz/dakageo60z8.pdfIn PDF document text
    • http://insurancesouk.com/attendance_tracker_app_for_studentscehm0.pdfIn PDF document text
    • https://ripukalogud.weebly.com/uploads/1/3/4/3/134391837/8a3186b64.pdfIn PDF document text
    • https://ripumunilemaz.weebly.com/uploads/1/3/5/3/135302863/vinuxiregerenume.pdfIn PDF document text
    • http://shishkin-seed.xyz/interior_design_case_studyf00wj.pdfIn PDF document text
    • https://kofuwirobunugob.weebly.com/uploads/1/3/4/3/134318534/4023060.pdfIn PDF document text
    • http://7evenrp.ru/64206050477jnt74.pdfIn PDF document text
    • https://wunevebisa.weebly.com/uploads/1/3/5/3/135306556/4539155.pdfIn PDF document text
    • http://plsale.pro/9_months_before_october_24_2006aw1sy.pdfIn PDF document text
    • https://vasikeja.weebly.com/uploads/1/3/2/7/132710563/lelifadotematur.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/metubevozisul/bhagavad_geeta_in_marathi_with_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/98607495409.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/adobe_photoshop_7_for_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/plus_size_formal_dresses_with_pockets.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/79010870247.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_off0000ca6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA6A 5284 bytes
SHA-256: db0b997ef4191fb143aa6391fddc47a01dc428877c8a657cab10b283aa2345e6
font_01_sfnt_off0000dc80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC80 10896 bytes
SHA-256: 406620ad59550e613267dd8f51937e26ddbb063f1ccd732f196b464e210beae8