Malicious PDF — malware analysis report

Static analysis result for SHA-256 918029744a64fabd…

MALICIOUS

PDF

74.3 KB Created: 2021-02-16 13:38:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: af5db8b673ec1118f32420d89099a615 SHA-1: 57f1337a8886817a510cb96c80e3e8eea07c71cc SHA-256: 918029744a64fabdd53eed30b8e1cec9354169029e324b6fd18e1f588bc9449a
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=intellectual+impostures+pdf In PDF document text
    • https://cdn.sqhk.co/kupejabel/CKBifJs/infection_wisdom_tooth_symptoms.pdfIn PDF document text
    • https://cdn.sqhk.co/kofatuziwu/dhhidjd/baking_gingerbread_cookies.pdfIn PDF document text
    • https://cdn.sqhk.co/kipezipilojo/iHhegjI/borarobuzizesisigekedim.pdfIn PDF document text
    • http://setofexperience.site/android_assets_text_file_readkqb40.pdfIn PDF document text
    • http://5gusevshop.space/lloyds_pharmacy_digital_thermometer_reviewuibek.pdfIn PDF document text
    • http://takipleskazan.org/rabbit_population_growthplx3s.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/jemazejodep/baby_doll_main_sone_di_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/anaconda_1_movie_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/grass_brushes_for_photoshop_cs6_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/tokexamutisupixev.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/child_of_light_novel.pdfIn PDF document text
    • https://s3.amazonaws.com/pojikovewijeja/dark_blue_short_formal_dress.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/anandam_hd_movie_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/norufalefita.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/miwobetigedogeroduwupug.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_off0000e58f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE58F 5236 bytes
SHA-256: bb4fd6bded7c10b9a32349eaadaccd3398a9c90fff542d10409b800dcd1cf8e3
font_01_sfnt_off0000f742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF742 10832 bytes
SHA-256: bf729351121da798f361f56300d5685a534a68f153e4a8504ab865009358fbf2