Malicious PDF — malware analysis report

Static analysis result for SHA-256 098b1bd8803f15b3…

MALICIOUS

PDF

70.9 KB Created: 2021-02-17 04:08:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7c52bfb97076c35a8f9482aff2bf4433 SHA-1: a0cd9069f7b76b8ab106a16333a92f9351354490 SHA-256: 098b1bd8803f15b36fbd161c496090ec82e3dedf6adfacbfc2797a41210774ea
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=what+are+the+different+models+of+decision+making PDF link annotation
    • https://cdn.sqhk.co/kotoweraga/jg5jbih/race_tap_color_road_clear.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417222/normal_5ffb4cf97c67e.pdfIn PDF document text
    • https://cdn.sqhk.co/banijuwa/iicZUBV/xeruziwa.pdfIn PDF document text
    • https://gabinomila.weebly.com/uploads/1/3/4/7/134763369/labidajexef-bukafovuligama-retiduxota.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502567/normal_6013aa35487a5.pdfIn PDF document text
    • https://kezexawu.weebly.com/uploads/1/3/0/8/130814062/xopewejufesenodoza.pdfIn PDF document text
    • https://cdn.sqhk.co/daladovum/jynidjd/little_bird_jump_bird_tossing.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449184/normal_5ff0e869db627.pdfIn PDF document text
    • https://cdn.sqhk.co/tatakakuwito/gg1hbgj/fill_gradient_color_photoshop.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/Chbjjha/pogepokelokizotijanado.pdfIn PDF document text
    • https://gemunokixelu.weebly.com/uploads/1/3/6/0/136095878/visifaj_koxujuludoxaba_jigufebalat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494440/normal_5ff6826f10bba.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/votubukaxogilix/biriwijeriteme.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/17731478513.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/dugomeg.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_off0000d9c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C1 5512 bytes
SHA-256: 84291bb56685d191e25e28f67c83ae5057b904c2a4210ce9fb79cf9dd0fbb937
font_01_sfnt_off0000ec63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC63 9996 bytes
SHA-256: 729f0974c490aea8e4658d9fa91c7d8453b13956bae6709de5a9ec53710ae134