Malicious PDF — malware analysis report

Static analysis result for SHA-256 495d6c8fa54dd3ab…

MALICIOUS

PDF

65.1 KB Created: 2021-02-27 21:34:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: deecec485300685bedd410e3cb5a7ef9 SHA-1: 6ff83e36f4b09a663fbe09b1e5a5a4857f2c6e65 SHA-256: 495d6c8fa54dd3abe8b137299823923980d48b305b9764fa1c2bd49c517412c6
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xajibur.ru/award?keyword=sig+sauer+nightmare+cost PDF link annotation
    • http://kinoogf.space/beethoven_sonata_14vagrx.pdfIn PDF document text
    • http://nashremont.site/smile_emoji_imagesrzzks.pdfIn PDF document text
    • https://jamekefexufi.weebly.com/uploads/1/3/4/8/134866820/d3a1e3222a55.pdfIn PDF document text
    • http://juluzenaluziwo.22web.org/bosch_silence_plus_46_dba_heat_dry.pdfIn PDF document text
    • http://datifuxevewa.22web.org/zaduta.pdfIn PDF document text
    • https://fegafedanopi.weebly.com/uploads/1/3/4/3/134311678/lavubevuku.pdfIn PDF document text
    • https://depovazopalixu.weebly.com/uploads/1/3/2/6/132681382/nilosataxexatus.pdfIn PDF document text
    • https://cdn.sqhk.co/desogepupema/3laicLO/kubeziximubidipofebepop.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/faluzotixupi/the_lord_of_the_rings_the_return_of_the_king_gameboy_advance.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/kursk_game_guide.pdfIn PDF document text
    • http://robexekipojop.rf.gd/diminuendo_means_the_same_as_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/bihar_police_constable_syllabus_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/green_screen_free.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/jukeli.pdfIn PDF document text
    • http://getitusedoniriv.epizy.com/1001_nights_hookah_lounge_bar.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_off0000c284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC284 5284 bytes
SHA-256: 9be17e9c0bea6d968add3b42e38297d838d9d8aa6a528a3c2b0851eaac562472
font_01_sfnt_off0000d455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD455 10332 bytes
SHA-256: 13cbe3785ac682232071321d5d40610195880940b771ea330b95b4f183be1125