Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7e7ea0d207cc09d…

MALICIOUS

PDF

71.7 KB Created: 2021-02-18 04:56:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f31778d586a240552a05c8e6216bda31 SHA-1: 843af3bdc13d5037204dda9a98bdefceff6b6783 SHA-256: b7e7ea0d207cc09d940a6c480bca186698fdf80bf32460e6c74e211b953e7ea9
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=tour+guide+speech+in+museum PDF link annotation
    • https://ravemazezaj.weebly.com/uploads/1/3/4/8/134885195/xozixus.pdfIn PDF document text
    • http://newser.site/fukogakipidigivawiwuktqzs6.pdfIn PDF document text
    • http://indital.space/tezaab_full_movie_hd_720p_downloaddo9eg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488335/normal_5fe912745f21b.pdfIn PDF document text
    • https://xavuzilutose.weebly.com/uploads/1/3/1/0/131070872/vuvarusoser.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/forupokisip/63726027079.pdfIn PDF document text
    • http://pujixedigegogup.epizy.com/lazepokigufemofefedileb.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/best_android_games_2018_offline_action.pdfIn PDF document text
    • http://fefekug.rf.gd/helix_cabal_free.pdfIn PDF document text
    • http://tawaxinazaka.rf.gd/adobe_acrobat_standard_version.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/wezaxugap.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/vunibufojisuza.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/background_ppt_menarik_pendidikan.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_off0000dcd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD0 5196 bytes
SHA-256: 5c53ae9286c4b95babd2d1e82f94dcbe34867aae387987e63419b99361b02a46
font_01_sfnt_off0000ee57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE57 10440 bytes
SHA-256: 6f3c297f6c9452c2a876b0c001eb186b83e93991d70cbf1e4596b5379d36cd0a