Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f538788ea3eadce…

MALICIOUS

PDF

72.9 KB Created: 2021-02-11 21:04:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1a1d477656ed9be110842502b4ca4505 SHA-1: 96b6b954c8e9ca286a73400d1cc9cc6691eed8e8 SHA-256: 6f538788ea3eadce3f3f3a0fc00dfe86ab30ad31b30a6f8531848f338212b73d
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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.
  • 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://yafferge.ru/wix?keyword=the+culinary+professional+study+guide+answer+key In PDF document text
    • http://fifamarketbot.com/biginugiwegvzhk.pdfIn PDF document text
    • http://7lessons.site/radiometric_dating_practice_worksheet_answersxzo7s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464870/normal_5ff53e61a2707.pdfIn PDF document text
    • http://olivamebel.com/rollerball_2002_paul_heyman3hpuj.pdfIn PDF document text
    • http://money-team.site/pukuxarefirogumelurubajozept.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387233/normal_5ffb35cade363.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416125/normal_6008b1b32ecf6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421960/normal_5fcc6c331663a.pdfIn PDF document text
    • https://cdn.sqhk.co/bilanogakiw/hiak9ia/car_racing_simulator_games.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/egihfjd/jipatavajofenu.pdfIn PDF document text
    • http://lnstagram-office.com/92438206760gf47f.pdfIn PDF document text
    • http://wgathering.org/opus_2015_crackn3bdi.pdfIn PDF document text
    • http://mivetys.xyz/808735480792oohu.pdfIn PDF document text
    • http://life50it.pro/beravotunulojol2ed0u.pdfIn PDF document text
    • http://uniques.space/kid_learning_videos_preschoolpy35s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gumajixu.rf.gd/find_path_of_assets_folder_android.pdfIn PDF document text
    • http://mudozegiviw.epizy.com/wuzivatewon.pdfIn PDF document text
    • http://revuzulikasulo.epizy.com/traitement_sinusite_chronique.pdfIn PDF document text
    • http://buxazub.epizy.com/57055007211.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_off0000e04b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04B 5624 bytes
SHA-256: e8bc3587bdaf9d33574e9ab3a9bfad4e3a070e1287bb17176f832e8463f22a10
font_01_sfnt_off0000f382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF382 10424 bytes
SHA-256: 53efda20d7c29a7b93e61c95f389774d705795093ee430008b023ac949d8ba97