Malicious PDF — malware analysis report

Static analysis result for SHA-256 dae1778c553a5107…

MALICIOUS

PDF

67.1 KB Created: 2021-02-26 18:34:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: fdb6ac2888eebab272c782a0682aec61 SHA-1: 1cb6db491b2eeb954aa086d069f7798ad9b75eb9 SHA-256: dae1778c553a51075976a7c2c13a0ce9f2487eb6109154d14c5f30a4d12cc02a
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://jottigo.ru/123?utm_term=anglophile+english+learning+centre+karachi PDF link annotation
    • http://vazawujuzu.sportsontheweb.net/5_languages_of_love_gary_chapman_test.pdfIn PDF document text
    • http://manovina.mypressonline.com/protocol_helicopter_remote_control.pdfIn PDF document text
    • https://fovubimosifiwu.weebly.com/uploads/1/3/4/3/134324820/tefojuxo-jumujali-miputoxuvejeme.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/turn_off_stability_control_jeep_jk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457590/normal_5ff348980cd00.pdfIn PDF document text
    • http://balegetiwep.mywebcommunity.org/five_elements_of_narrative_writing.pdfIn PDF document text
    • http://beviluxenumiliv.mywebcommunity.org/all_modal_verbs_in_english_grammar.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/tixedujegibex/google_chrome_update_2019_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/attack_on_titan_tribute_game_multiplayer.pdfIn PDF document text
    • http://tiluxusimutine.atwebpages.com/22917698346.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/liquido_amniotico_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/65871749580.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/ascom_hasler_system_220_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/hypertension_guidelines_2017_algorithm.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/zuvokejevekusinenuloga.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_off0000ca1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA1D 5248 bytes
SHA-256: ead65b08016c789950a5dac34eaaa72f015d8bce1b9df4eb5f6c0559e12d9cd1
font_01_sfnt_off0000dbf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF4 10388 bytes
SHA-256: b5765059b5f15806d58c09de9c2afda16096fa61e20b983c13f3b05588f1241d

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