Malicious PDF — malware analysis report

Static analysis result for SHA-256 91335b677dbda459…

MALICIOUS

PDF

62.4 KB Created: 2021-02-18 00:38:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1766201dceb29352c986748324eba403 SHA-1: 0fbfd4771ced7c9d078e01df95bade243e4d34e4 SHA-256: 91335b677dbda45969f942f3290b8584c9f9ff47d38cc3fd32583836625de9a6
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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.
  • 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=kenmore+frost+free+commercial+freezer+manual In PDF document text
    • http://itdiscount.pro/accu_chek_softclix_lancets_walmartowarq.pdfIn PDF document text
    • http://mosdendy.store/interview_with_the_vampire_full_movie_google_drivewj7o8.pdfIn PDF document text
    • https://xisofapetuv.weebly.com/uploads/1/3/4/7/134747578/pidodo_kivude_mibojaxawov.pdfIn PDF document text
    • http://qqkaxes.xyz/91041461978kqd4g.pdfIn PDF document text
    • https://cdn.sqhk.co/gepeduvo/Z8qWC1F/46436623023.pdfIn PDF document text
    • http://afracheat7.xyz/38792391201l2maq.pdfIn PDF document text
    • http://leqqurint.online/ch-_47f_aircrew_training_manualzdc4b.pdfIn PDF document text
    • https://dirotigakavomak.weebly.com/uploads/1/3/4/2/134235834/kotozudixokake.pdfIn PDF document text
    • http://lessonsonline.site/how_to_write_an_essay_for_an_application8fte4.pdfIn PDF document text
    • http://jobs-ingenieur.best/what_can_you_cook_in_a_black_and_decker_toaster_oven0oeby.pdfIn PDF document text
    • https://dinowupeguf.weebly.com/uploads/1/3/1/3/131379410/731709.pdfIn PDF document text
    • https://cdn.sqhk.co/kinubowa/ghdhaUK/word_wars_game_java.pdfIn PDF document text
    • http://kudretbozaci.com/fitotimuvaritufugidudite9wofx.pdfIn PDF document text
    • https://bilujadaju.weebly.com/uploads/1/3/4/7/134772480/pusom.pdfIn PDF document text
    • https://cdn.sqhk.co/wufevinek/je5Dihl/mafolerifazerag.pdfIn PDF document text
    • http://dress-russia.ru/install_guide_wordpress_plugin_without_ftpqg0r6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000b87d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB87D 5048 bytes
SHA-256: 20a30cc1cdbf9a87c9a958d530be06235fc23dcfc0926eb47dadf1b052f3e417
font_01_sfnt_off0000c9a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A1 10112 bytes
SHA-256: 7f4427d94d670c70c3aa50759d37a91daacf29efaab423a4bdb86533a1992f9b