Malicious PDF — malware analysis report

Static analysis result for SHA-256 0317a9ff6a74fff1…

MALICIOUS

PDF

80.4 KB Created: 2021-02-02 14:44:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: c26be77e46c1669c70062ab749c59843 SHA-1: e157e524db8bf6622f8b571115a1709a57e17df9 SHA-256: 0317a9ff6a74fff131bb59e0b5ec513dd971f381e8607e9a6493bc5dda9eda3d
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://jacksth.ru/123?utm_term=quotes+about+homesickness PDF link annotation
    • https://piwirajaluz.weebly.com/uploads/1/3/5/3/135312697/7827516.pdfIn PDF document text
    • https://sinezotuze.weebly.com/uploads/1/3/0/9/130969777/116531.pdfIn PDF document text
    • https://rogubofiduga.weebly.com/uploads/1/3/1/0/131069879/e21d4.pdfIn PDF document text
    • https://cdn.sqhk.co/novujarogoga/jI1ulgi/rufagetubujegexevom.pdfIn PDF document text
    • https://cdn.sqhk.co/nuwobevina/ieIJXge/monument_valley_az_weather_10_day_forecast.pdfIn PDF document text
    • https://cdn.sqhk.co/bipadifudame/hfiegdd/outdoor_garden_statues_for_sale_near_me.pdfIn PDF document text
    • https://wulelosen.weebly.com/uploads/1/3/5/9/135992808/850223.pdfIn PDF document text
    • https://nebenumepidenok.weebly.com/uploads/1/3/5/3/135307723/duruxuj.pdfIn PDF document text
    • https://fabuduviwanor.weebly.com/uploads/1/3/4/7/134739750/7a5050.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/kugelilizibuwum/breaking_news_background_video_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/bowtie2_manual_index.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/85926296482.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/sizad.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/40699628436.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/wevixoziwemewubezojinu.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_off0000fc16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC16 5176 bytes
SHA-256: 19be35c34f342bb2624858ee792391fe553f18bbbbd51f761f7df63223e9823a
font_01_sfnt_off00010d8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D8A 12328 bytes
SHA-256: 37fba993d05c069e98d0b5e80f1935e507a2cf1609c40e8ed140a66e1acaae02