Malicious PDF — malware analysis report

Static analysis result for SHA-256 31909bb6b8979190…

MALICIOUS

PDF

67.7 KB Created: 2021-02-21 05:26:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 97338bbd07d4216585b0c86d800b3464 SHA-1: 626c5c4a4afb7429080dd21521a1a643ba47166f SHA-256: 31909bb6b897919015effb7ced33e7f3473146cd5f8f1e711a2e766fb0259995
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://crophysi.ru/wix?keyword=asce+manual+74+4th+edition In PDF document text
    • https://cdn.sqhk.co/kavejufa/bgeBrie/18818154645.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/aMZlLii/83530756015.pdfIn PDF document text
    • https://cdn.sqhk.co/sogefuluf/hj5UhDs/equalizer_fx_pro_app.pdfIn PDF document text
    • http://tujozavido.66ghz.com/52173898736.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497356/normal_6021ad3fe9848.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/lidicgc/83126132438.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381082/normal_60175c80325e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484635/normal_6004e8d508f04.pdfIn PDF document text
    • https://cdn.sqhk.co/pawanipol/jOhcHZ6/33302068740.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412999/normal_600fc4c099f54.pdfIn PDF document text
    • https://cdn.sqhk.co/webuzifinuno/fDjjoge/menevake.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379240/normal_5fd62d69b0268.pdfIn PDF document text
    • https://cdn.sqhk.co/fusunusol/hfijVQB/48999374518.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tugoxejemikoze.epizy.com/14954962455.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/wafetotuwupexobosalaw.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/free_movie_s_no_registration.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/romeo_and_juliet_review_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/boris_fx_10._0_1_plugins_free.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_off0000cc7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7F 5240 bytes
SHA-256: a0c69abcdfa4518f745d12347833b1ea6e0ef7010417d0afe0eb933ee242311b
font_01_sfnt_off0000de37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE37 10400 bytes
SHA-256: 36ec6d72abf76d720c2bc307858735c07771fbbeb85a720887143b7255117753