Malicious PDF — malware analysis report

Static analysis result for SHA-256 372a4f73e2236027…

MALICIOUS

PDF

75.8 KB Created: 2021-02-10 20:51:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c68d7082a265a69cc9deded6f1a1f40a SHA-1: 7b3ea49505e768cd7f2d0428978ebe96f1821e49 SHA-256: 372a4f73e2236027f284cb50dd08b47c8fd27c3ed018c3954ad1d10cc953968c
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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/wb?keyword=dell%20compellent%20sc4020%20installation%20guide In PDF document text
    • https://valejuti.weebly.com/uploads/1/3/0/7/130739952/viwefexifalawal_movuvisatoxoxat.pdfIn PDF document text
    • https://muzezibabut.weebly.com/uploads/1/3/0/7/130739211/1908710.pdfIn PDF document text
    • https://zokejiwiperasuk.weebly.com/uploads/1/3/4/6/134668939/1984467.pdfIn PDF document text
    • http://mixojixirofaj.iblogger.org/vamolikukinejofikenodixa.pdfIn PDF document text
    • https://cdn.sqhk.co/buganisazobu/ADihShb/lupikivewu.pdfIn PDF document text
    • http://kuzojud.66ghz.com/free_community_helpers_worksheets_for_preschoolers.pdfIn PDF document text
    • https://cdn.sqhk.co/relulapezele/ggS7wSP/yale_duo_mobile_new_phone.pdfIn PDF document text
    • http://pixell.store/english_writing_bookevhza.pdfIn PDF document text
    • http://ipai.online/100195846301w7zq.pdfIn PDF document text
    • http://moshon.space/fojawewazaw229ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456998/normal_5ff1672e9525c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370530/normal_5ff54aca19304.pdfIn PDF document text
    • http://acgmgroup.ru/40995090845zh9yi.pdfIn PDF document text
    • https://cdn.sqhk.co/javukapegami/ySjjvgi/mens_haircuts_medium_sides_long_top.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/jbFjcgf/91723529241.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/nakevoja/49282880962.pdfIn PDF document text
    • http://xatosizukav.epizy.com/asset_disposal_request_form_template.pdfIn PDF document text
    • http://sezusol.epizy.com/66136628030.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_off0000ea39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA39 5656 bytes
SHA-256: d460c8afac9302cb187c15d796cfbd505f4cf6a238425869215e8ab02d511b73
font_01_sfnt_off0000fd77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD77 10744 bytes
SHA-256: e0f7a4432cc157dc6e5eb1919c203c6cbf594c94d2fbdb887225a4d5c16c45fb