Malicious PDF — malware analysis report

Static analysis result for SHA-256 11701c676ececd77…

MALICIOUS

PDF

84.1 KB Created: 2021-02-18 05:39:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1b8639cb187a01854854c5ca7286560b SHA-1: defc18595f8817ee9528b7b8107388b7dd3ebe24 SHA-256: 11701c676ececd771a5a679e3082091a524ea43c98dad5f6ba70ba14dc973e53
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to trick users into calling a phone number, a common tactic in phishing and tech-support scams. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it may exploit vulnerabilities or lead to malicious content, aligning with exploitation and spearphishing attachment techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • 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://seumenha.ru/123?utm_term=plantronics+backbeat+go+410+wireless PDF link annotation
    • http://lofitner.buzz/letterhead_envelope_business_card_template4rh90.pdfIn PDF document text
    • http://vykupavto54.ru/grammar_worksheets_for_grade_59mup3.pdfIn PDF document text
    • http://24goodstore.site/verizon_visa_card_reviewm31vv.pdfIn PDF document text
    • http://teleporttur.ru/gevexovilonrqj5.pdfIn PDF document text
    • http://ronebiwoti.22web.org/greaseproof_paper_sheets_large.pdfIn PDF document text
    • http://damvglaz1.xyz/voliregimiltbqe7.pdfIn PDF document text
    • http://itsnat.space/alcatel_lucent_ip_touch_4019_manual11zu8.pdfIn PDF document text
    • http://pr-bux.online/hollow_knight_cutscenesx5974.pdfIn PDF document text
    • http://xodinazafomizi.22web.org/zelda_ocarina_of_time_detonado.pdfIn PDF document text
    • http://alteramaks.world/burnout_paradise_legendary_cars_trophy_guiderjg55.pdfIn PDF document text
    • http://hookup154.site/bioecological_theoryawgx1.pdfIn PDF document text
    • http://xovonakajo.22web.org/adding_unlike_fractions_worksheets.pdfIn PDF document text
    • http://merovew.xyz/ygs_kimya_konu_anlatC4B1mC4B1_indirjnkx2.pdfIn PDF document text
    • http://dkshlyap.ru/39683190393lo1jr.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/xeruxaxer/alcatel_2008g_mobile_phone_user_manual.pdfIn PDF document text
    • http://panurimo.epizy.com/64371000984.pdfIn PDF document text
    • http://duzixaludu.rf.gd/tudid.pdfIn PDF document text
    • http://gumigojozupe.epizy.com/kojekigotifu.pdfIn PDF document text
    • http://zinizebaki.epizy.com/13048534327.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/gwent_the_witcher_3_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/french_er_verbs_worksheet.pdfIn PDF document text
    • http://sazizonega.rf.gd/65008479432.pdfIn PDF document text
    • http://xomexopiguv.rf.gd/323504092.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF457 5548 bytes
SHA-256: a4adc797eee73d486cd3d8644eeba309a6d0fcfdc60cf3abcfffe84edf05af92
font_01_sfnt_off0001076e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076E 11324 bytes
SHA-256: e83e41b1958625a9eb007f2af1b8fc218c1df38853477b47273e5d5277ae76c1
font_02_sfnt_off00012d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D7A 16108 bytes
SHA-256: aed46c9af23f208f135cb03afacfd1ac790ba89857c5134c11dc43e7260cc7d5