Malicious PDF — malware analysis report

Static analysis result for SHA-256 715cf1975a4ff2ae…

MALICIOUS

PDF

77.0 KB Created: 2021-04-02 00:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 752da8bc0d152c91696b952d79d4f6c3 SHA-1: 0d7435c1e3721501f658d71ce887f1573c4ea683 SHA-256: 715cf1975a4ff2aea18bf797ea4b6589c9c3dfba1c160f28f2f5b105ee2ae7b7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs pointing to disposable domains, suggesting a link farm designed to host malicious content or redirect users. The presence of a 'download button' heuristic and a 'callback lure' further supports a phishing or scam attack pattern. While no scripts were explicitly extracted, the PDF structure and numerous malicious URLs indicate an attempt to trick the user into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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 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) documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ponafet.ru/123?utm_term=voice+changer+app+for+online+games+android PDF link annotation
    • http://linavaluviriv.getenjoyment.net/guzonusav.pdfIn PDF document text
    • http://towexiwi.sportsontheweb.net/60960974702.pdfIn PDF document text
    • http://chistohome.moscow/what_type_of_angle_is_360_degreesfgzut.pdfIn PDF document text
    • http://nonretloli.site/manual_de_supervivencia_urbana_descargar9vta5.pdfIn PDF document text
    • http://gouliwer.online/85890648890s62fk.pdfIn PDF document text
    • http://bio-ita.fun/why_is_my_battery_charger_not_workingn8k7r.pdfIn PDF document text
    • http://gizesodawesiv.mywebcommunity.org/gigodaletajigulelo.pdfIn PDF document text
    • http://nicepics.xyz/87387686896rxcjw.pdfIn PDF document text
    • http://helplnstagramcontact6088756.com/23820407876e2zfh.pdfIn PDF document text
    • http://dk-inc.xyz/90556065752m9jwe.pdfIn PDF document text
    • http://dominis.xyz/tivo_series_3_dvrd6pg9.pdfIn PDF document text
    • https://zefinefan.weebly.com/uploads/1/3/2/8/132816158/da17b.pdfIn PDF document text
    • http://persequen.com/samsung_rugby_4_battery_liferz87r.pdfIn PDF document text
    • http://esportzmlevent.com/risekemorikogofimabodi40y21.pdfIn PDF document text
    • http://btsworld.org/boravuqk10p.pdfIn PDF document text
    • https://kuxodebareku.weebly.com/uploads/1/3/4/0/134042390/rizaruwe_vufetubaz_dotaj.pdfIn PDF document text
    • http://parkji5x.xyz/powimeribhd28.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/badodemebo/dialectical_behaviour_therapy_techniques.pdfIn PDF document text
    • http://jimomurapujivo.onlinewebshop.net/physics_for_scientists_and_engineers_giancoli_ebook.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/baking_sheet_paper_for_sale.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_off0000eee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE0 5532 bytes
SHA-256: f7cd7390572a71e70090f0c780dd2b90e18effc4dc4107d2b163badfab7f6bb1
font_01_sfnt_off0001018f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018F 10356 bytes
SHA-256: 9414a8979a76ff3094ef821ea6df08a729622b65f3827cb05f17293a2f1e7922

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