Malicious PDF — malware analysis report

Static analysis result for SHA-256 a92856c285755463…

MALICIOUS

PDF

70.3 KB Created: 2021-02-16 08:21:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 726d46b01c6ac8cb3df4dbbe1ce76cca SHA-1: 41472796aa1366c7516145e87205471d10e48b97 SHA-256: a92856c285755463ae98b651ee1911ca17541a56acd4a183427eb4a94562968c
194 Risk Score

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/wix?keyword=wii+shooting+games+with+gun In PDF document text
    • http://fajikiviwakux.22web.org/damage_reported_on_carfax_means.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488346/normal_6010d42ac3ffe.pdfIn PDF document text
    • http://smartline58.ru/337719218634hw83.pdfIn PDF document text
    • http://reduslim-shop.website/autonomous_differential_equation4909n.pdfIn PDF document text
    • http://adv-workshop.site/73309453089j5n76.pdfIn PDF document text
    • http://honbiz.pro/xalisimuwogevojekoa9qi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404113/normal_60296f1bd0580.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zowujobosega.rf.gd/alchemist_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/pegabamogaxejepazodejokin.pdfIn PDF document text
    • http://vukanaxugosazed.rf.gd/he_s_a_pirate_sheet_music_boss.pdfIn PDF document text
    • http://zumewozuzetarun.epizy.com/facebook_twitter_icon_vector_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/37621835637.pdfIn PDF document text
    • http://dozopum.rf.gd/paratufad.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/simplifying_radical_expressions_worksheet_math_aids_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/4080118122.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_off0000d465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD465 5076 bytes
SHA-256: c388dabb0e0846d67c4c2360f2925d1a3318004d074cc47157fd87feaa3b9ff5
font_01_sfnt_off0000e59c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59C 12104 bytes
SHA-256: 4a03c57e87e24ea4754a6228a85469094b31e959f89fd027fa9dbd02dac41851