Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ff4942a635e248d…

MALICIOUS

PDF

69.5 KB Created: 2021-03-04 18:24:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: e2a81d770dbc779b54f9eded0a06613b SHA-1: ecd583749960fa4782a2addb2f6b45e3a6449108 SHA-256: 9ff4942a635e248dae49cbeded3cdb04b8ec202b9d62495b5b13a8a4b498be87
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/award?keyword=pretty+little+liars+book+series+review PDF link annotation
    • https://cdn.sqhk.co/tiwumixe/ifk8jbE/catchmaster_moth_traps.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390637/normal_6032756d53977.pdfIn PDF document text
    • https://zapojejomelaxi.weebly.com/uploads/1/3/0/7/130775516/9652479.pdfIn PDF document text
    • https://minadefimufev.weebly.com/uploads/1/3/4/6/134635785/wukafelibit-tonebixuxob.pdfIn PDF document text
    • https://kevefizi.weebly.com/uploads/1/3/1/8/131871405/2062538.pdfIn PDF document text
    • https://nedotumawu.weebly.com/uploads/1/3/4/6/134626041/9527221.pdfIn PDF document text
    • https://fubuzupa.weebly.com/uploads/1/3/5/3/135324320/vuboduz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393754/normal_5fefb39faef60.pdfIn PDF document text
    • https://suzoniku.weebly.com/uploads/1/3/4/4/134456843/pibogepez.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/uZ0jijg/tasiluburokufotu.pdfIn PDF document text
    • https://funofumid.weebly.com/uploads/1/3/4/8/134886651/d1811.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/pibabopuduj/cg_dj_syk_all_song_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/42735464308.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/organisational_policy_for_acknowledging_sources_of_information.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/avast_antivirus_license_key.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/27494182852.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/background_app_refresh_whatsapp_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/98154487467.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/78968645362.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_off0000d254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD254 5136 bytes
SHA-256: 5bbee5c3679975e10a3841cb79ccfda9f847f195632eb3e6b7198cc585cdfea7
font_01_sfnt_off0000e3f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F2 10756 bytes
SHA-256: 912c82edb422ce5221dfc79cf907b5008612cfd036c2d8f759390bdb9c77bdb0