Malicious PDF — malware analysis report

Static analysis result for SHA-256 870fd8321b2317fe…

MALICIOUS

PDF

72.8 KB Created: 2021-01-28 23:50:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9470d26a977a744500c0ba93b2125f12 SHA-1: e61029ad01896bf22ab9def96c2a62489679f4ec SHA-256: 870fd8321b2317fe4ca786b9e62e92d50f396a55173f8d857820009a242a7fc3
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including ML classifiers and ClamAV, as malicious. It contains links to known malicious redirector infrastructure, specifically 'https://yafferge.ru/123?utm_term=scented+toilet+paper+infection', which is designed to lure users into clicking through to potentially harmful content. The document body, though heavily obfuscated, contains references to URLs that appear to be part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=scented+toilet+paper+infection In PDF document text
    • https://cdn.sqhk.co/sobilowibid/ibhhFON/among_us_wallpapers_creative_names.pdfIn PDF document text
    • https://cdn.sqhk.co/wazilisiko/egXgihg/67031453592.pdfIn PDF document text
    • http://bonifacy.site/37205366843c4xnt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467300/normal_5feed5343109b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476927/normal_5fef47d7749d9.pdfIn PDF document text
    • http://helpcopyright-service.com/85214419044q5o99.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/bCM9GQf/anthill_farms_abbey-_harris_pinot_noir_2016.pdfIn PDF document text
    • https://cdn.sqhk.co/woferomot/ejJijlW/christopher_ewanowski_md.pdfIn PDF document text
    • http://subbellassecret.com/katepobokazazon4n6m9.pdfIn PDF document text
    • http://biomaniks.website/anime_studio_story_lite_mod_apk4egek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393762/normal_5ff9ec20c83d7.pdfIn PDF document text
    • https://cdn.sqhk.co/nezerozara/kfgjjop/marshmello_wallpaper_gif.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/sajezife/accessible_parking_permit_ontario_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/falamusafitig.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/architectural_drawing_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/wirolagiga.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/49280942700.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/12377485013.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0D 5072 bytes
SHA-256: 2c55b70ec55de438f51a69d169f3faea5507f5a1e2d2bf4b8c1318b2315acbf5
font_01_sfnt_off0000f060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF060 11196 bytes
SHA-256: b84cccd7f10658f3d830149dfc953f3a03a321d588f3a12222be15c720c53fce

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