Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ca0781d2b446abb…

MALICIOUS

PDF

72.2 KB Created: 2021-03-31 12:17:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 699d271d1f3c70b47f0f5620be7860eb SHA-1: 2b7f8a05a0ab8d05389375c55d4a6192158d0c81 SHA-256: 7ca0781d2b446abbbb0770bc387ce91034ac520df36fef1107de91d16b2f1f07
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs point to suspicious domains, likely serving as lures or download sites for further malicious activity.

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
  • 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.
  • 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://lozipotod.ru/wix?keyword=sony+str-de197+stereo+receiver PDF link annotation
    • http://zixivudu.getenjoyment.net/6114956549.pdfIn PDF document text
    • http://newyearshop.site/transunion_free_credit_report_canadan3lj4.pdfIn PDF document text
    • https://cdn.sqhk.co/tititafoza/XZihYKp/84761242281.pdfIn PDF document text
    • http://rovanenafet.getenjoyment.net/excel_2020_macros_tutorial_free_download.pdfIn PDF document text
    • http://betmoy57.com/80783474566stho2.pdfIn PDF document text
    • http://zenajok.medianewsonline.com/the_vintage_book_of_latin_american_stories.pdfIn PDF document text
    • http://forecast.bet/captive_prince_download_freezbwmj.pdfIn PDF document text
    • http://theporte.xyz/formule_avantage_en_nature_voiture_2017d6928.pdfIn PDF document text
    • http://nilokobavetefe.22web.org/15252793690.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://limaxinsto.xyz/football_quiz_answers_1-_10xwkwc.pdfIn PDF document text
    • http://com-copyrighit.com/598188190055q54m.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/6gcZ2jg/panda_jumper_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/rotexopapi/ohfjje2/insert_excel_spreadsheet_link_into_powerpoint.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e97662ba-880a-4e7d-a8b1-adb083ae76e6/miracles_cs_lewis_summary.pdfIn PDF document text
    • http://sukokovevaz.atwebpages.com/essential_words_for_the_toefl_steven_j_matthiesen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3daf059e-2f0e-4ed5-8089-2d4936c9e29b/pixma_mg3520_airprint_setup.pdfIn PDF document text
    • http://kixomeremit.epizy.com/63014818629.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04b859df-7ec1-4285-92f8-7f2e63495b09/14058811494.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_off0000dbd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD1 5276 bytes
SHA-256: 5be925cbfe6d591352af1f0d8d187dc33b710e7e3d264d834fbc5398db825d1a
font_01_sfnt_off0000edf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF5 11372 bytes
SHA-256: 9dada904dcd5de61072fb04fdbf81714fc2c8da2c09d3d32d059d31dc31322ce

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