Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf87d710ee7f1b67…

MALICIOUS

PDF

65.1 KB Created: 2021-02-24 10:28:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 66279b7b8d692f4f9143fc235dedd8ac SHA-1: f0e2e2475d1d2b69b823e0ce7924b8b371a9e55c SHA-256: bf87d710ee7f1b671d9e9522ab1265b2e1bd36f3b44ff78483cc2f8627f474be
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/infin?keyword=troy+bilt+pony+mower+deck+spindle PDF link annotation
    • http://tukiviretek.iblogger.org/44463377960.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445564/normal_601113ac80136.pdfIn PDF document text
    • https://cdn.sqhk.co/simosukolevo/35lKi85/16568982366.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/4jhumjg/ninjin_clash_of_carrots_trophy_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/tedalome/gdGighX/45558264942.pdfIn PDF document text
    • https://cdn.sqhk.co/vakanaju/7gez2qI/27759634414.pdfIn PDF document text
    • https://cdn.sqhk.co/kowetitemaro/hb5iaif/87595315474.pdfIn PDF document text
    • https://cdn.sqhk.co/woledibiroju/jbihiel/9299911126.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/LAigGHQ/hill_climb_racing_2_superbike_vs_formula.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ramawotinejog.epizy.com/satavakerasojuniboduresu.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/60087278769.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/animal_collective_nouns.pdfIn PDF document text
    • http://damewanobojojo.rf.gd/citadel_investment_group_annual_report.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_off0000bb43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB43 5356 bytes
SHA-256: b76e3aa82c05dc15b4b79f1b9bd8032da9cb056bc06712565da07dc5b95c081b
font_01_sfnt_off0000cd7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7C 12932 bytes
SHA-256: 2ba893b77d215bc5752de38bbdc44df927a2e09a436531718e1fb9aa37786e2a