Malicious PDF — malware analysis report

Static analysis result for SHA-256 72d9c1e5b478acf1…

MALICIOUS

PDF

65.0 KB Created: 2021-02-17 00:23:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7fce481906c7fac80480679d1f70d4e4 SHA-1: 4878aa5fb5265479130de6c6d086f86d4b7d479f SHA-256: 72d9c1e5b478acf10dfa2a231c0db14de108c7cdb68d5dde131855002a3f7daa
192 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=honda+mower+parts+manual In PDF document text
    • https://static.s123-cdn-static.com/uploads/4471686/normal_5ff9d93e36c12.pdfIn PDF document text
    • https://kigilejujagenit.weebly.com/uploads/1/3/1/4/131438309/b8d9a.pdfIn PDF document text
    • http://tokilekitikas.22web.org/bootstrap_html5_website_templates_free.pdfIn PDF document text
    • http://hushseo.online/eragon_book_5csd6j.pdfIn PDF document text
    • https://gumarifubora.weebly.com/uploads/1/3/4/4/134465571/3662184.pdfIn PDF document text
    • http://dvestideyli.xyz/wujorik1ilkf.pdfIn PDF document text
    • http://lupokixez.22web.org/36472639129.pdfIn PDF document text
    • https://xananitape.weebly.com/uploads/1/3/4/0/134095977/7897436.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372074/normal_5fde730b7078c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418556/normal_6012082473840.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://poresiz.epizy.com/osha_avoiding_electrocution_hazards_assessment_answers.pdfIn PDF document text
    • http://majojevonomofu.rf.gd/sheet_street_head_office_jhb.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/app_store_free_whatsapp.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/sherlock_holmes_season_5.pdfIn PDF document text
    • http://darewuxopasog.rf.gd/34557763784.pdfIn PDF document text
    • http://disobaratid.rf.gd/naluwaxumaz.pdfIn PDF document text
    • http://vawovujuju.rf.gd/metformin_dosage_for_fibromyalgia.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_off0000c556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC556 5160 bytes
SHA-256: d9b66791837294744de29db8ad6a890b732420accaed61106857cde502bbe6b8
font_01_sfnt_off0000d6d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D7 9444 bytes
SHA-256: 9af482c75252cc3a39c48c926ac9a3e2dd219ecf8833db19edb274439d184b5a