Malicious PDF — malware analysis report

Static analysis result for SHA-256 729fe7ab298ca8a7…

MALICIOUS

PDF

90.1 KB Created: 2021-03-10 12:43:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: f803e861a9d991b42b764ac786de2b3b SHA-1: e7217ee2ad31f39c6e98ebc2d25e1d70fd6fda3e SHA-256: 729fe7ab298ca8a7c65d2314c91673dab62f36c5c6bc669921b468a6adfea8db
146 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics as malicious, including ML classification and ClamAV detection. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to trick users into calling a phone number, consistent with callback phishing or tech-support scams. While no scripts were extracted, the PDF structure and external URLs suggest it may exploit vulnerabilities or lead to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://zajinet.ru/award?keyword=allen+dlp+test+series+pdf PDF link annotation
    • http://prognoz-football.club/keurig_k_cup_coffee_maker_bed_bath_and_beyondvjv5n.pdfIn PDF document text
    • http://setlyb.online/public_speaking_worksheets_for_high_schooltycfc.pdfIn PDF document text
    • http://lebedugipul.mywebcommunity.org/lefiraxejezepetu.pdfIn PDF document text
    • http://help-copyrighteamservice.com/bihar_board_12_admit_card_20198jcm8.pdfIn PDF document text
    • http://genoray.pro/setujevm46u7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403413/normal_5ffc733850891.pdfIn PDF document text
    • http://setopin.mypressonline.com/advance_math_formula_in_hindi.pdfIn PDF document text
    • http://eushopvmn.site/pasowisivulupikajumohsenp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485001/normal_6002560aa93e3.pdfIn PDF document text
    • http://mxbur.fun/which_p90x_workout_is_the_hardestlzc1n.pdfIn PDF document text
    • http://reabook.online/how_to_use_social_media_for_restaurant_marketing2nv30.pdfIn PDF document text
    • http://sethel.xyz/american_government_chapter_3_the_constitution_vocabularyrw0yj.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/zabevog/bedroom_layout_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43a449d7-d0af-4fd9-85ab-9a31dc37a31a/xeliledogimuregenub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dfaa399-db7b-4b45-876d-5c52e0a70d31/59146408295.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/bounce_dryer_sheets_australia_costco.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/84797956013.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/holt_mcdougal_geometry_textbook_answers_page_546.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68699580-11b0-4e73-9590-b7cea44b992e/31284848653.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0679ae0b-fd78-4bca-b82d-938c0de2dd9d/is_sat_cancelled_for_class_of_2023.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_off00011057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11057 4816 bytes
SHA-256: c78e30eb54e93adf4cf4af7594826c0a2ab385cedebbc3c5f77d9b0449d7af24
font_01_sfnt_off000120c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C6 10732 bytes
SHA-256: 3791c1b91dd58b7e4135ece2e3241ea6dcfa5f3c160ed8c591657ece898bde29
font_02_sfnt_off00014570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14570 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6