Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb96f18847cd599b…

MALICIOUS

PDF

71.1 KB Created: 2021-02-16 12:44:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 18de9cd24050e1a34d348f9dfd47175a SHA-1: cedbaae52966ef581504994eba326f2f273ec51b SHA-256: eb96f18847cd599b572ba365c1f02a21f76762426ad8366069b2e6ad3d86bc1b
196 Risk Score

Malware Insights

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

The PDF contains a high number of external links, many pointing to redirectors and potentially malicious content, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK' heuristics. The ML classifier and ClamAV also flagged this PDF as malicious, specifically as a phishing trojan. The embedded URLs suggest an attempt to direct the user to external sites for malicious purposes, likely phishing or malware distribution.

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=why+would+my+hot+water+heater+pilot+light+go+out PDF link annotation
    • https://cdn.sqhk.co/tofegejij/Azghggm/47383064313.pdfIn PDF document text
    • https://cdn.sqhk.co/fabozesemi/hijgejb/64865634708.pdfIn PDF document text
    • https://cdn.sqhk.co/lidojuxuxiro/ghjbnjb/41546559917.pdfIn PDF document text
    • https://sujepofuk.weebly.com/uploads/1/3/0/7/130775011/dadovifaguxi.pdfIn PDF document text
    • https://gebijodefilamoz.weebly.com/uploads/1/3/1/4/131406109/pokusus.pdfIn PDF document text
    • https://cdn.sqhk.co/jaruxabal/lhfVhfJ/zipawumox.pdfIn PDF document text
    • https://cdn.sqhk.co/kejaxedusuk/TsihIq6/love_stories_on_netflix.pdfIn PDF document text
    • https://cdn.sqhk.co/lukedivibeb/ivhbk0w/past_present_future_tense_examples_in_kannada.pdfIn PDF document text
    • https://xejapekedom.weebly.com/uploads/1/3/4/8/134864907/5451397.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/32tiazF/lemon_bundt_cake_recipes_from_scratch.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/titugome/tk_architect_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/37860986992.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/17963417668.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/36633818337.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/18091676984.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/can_you_take_melatonin_with_alcohol_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/amoled_live_wallpaper_apk_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/autocad_architecture_katalog.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 8

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_off0000d7ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BA 5404 bytes
SHA-256: f90353ed446af13fca9261b6260b31278a21fe9b1bd9dfcae97f3e6a61240292
font_01_sfnt_off0000ea07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA07 11000 bytes
SHA-256: 477acbbf3123b42b5f340c4a5dce348f7f0bdb3b5f494c5fa95cef26edf28ec4

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