Malicious PDF — malware analysis report

Static analysis result for SHA-256 a45facacf24a6e73…

MALICIOUS

PDF

82.2 KB Created: 2021-03-05 13:45:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 38418e201c2e534bd91037bf870c3e52 SHA-1: 9dafdae444a8f2dbd487e68c2636d5a575ad43cd SHA-256: a45facacf24a6e738baf0d2ea6c62f60303edc486f1dc568e6a3200a5ecec2f4
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • 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://crophysi.ru/123?utm_term=el+principito+online+hd+latino PDF link annotation
    • http://ridovise.sportsontheweb.net/94070532731.pdfIn PDF document text
    • http://lorewipa.scienceontheweb.net/42032277492.pdfIn PDF document text
    • http://kuxuvajivor.iblogger.org/m_b_a_course_information_in_marathi.pdfIn PDF document text
    • http://xedeporib.medianewsonline.com/computer_coding_languages.pdfIn PDF document text
    • http://gajelifuluxapov.mywebcommunity.org/8310437187.pdfIn PDF document text
    • http://mogimetekojubar.scienceontheweb.net/peer_gynt_music_in_movies.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vedixemalirugi.atwebpages.com/64735313042.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40157648-dcf5-46ad-b086-2ceafefdb2c0/36336668884.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/mipinosanakuravoze.pdfIn PDF document text
    • http://jakosorer.epizy.com/avery_labels_22806_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23198d99-4768-425b-901d-8e85d642ae43/craftsman_gt5000_manual_transmission.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e50402c1-9e95-4721-8e70-2ee964fb6f1b/troy_bilt_3100_psi_pressure_washer_pump_head.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db0e0e29-b490-4efe-aaa1-34be8564e84e/bexew.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/45082161873.pdfIn PDF document text
    • http://wolaxagemir.rf.gd/agneepath_full_movie_720p_openload.pdfIn PDF document text
    • http://sudemididesiz.epizy.com/zitadukamexuxogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c4155df-7cad-4fe1-8282-66e54330360c/48613049508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf8fe3d8-cddf-4638-99f2-8bf854aca628/garmin_2699_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3281d7e3-d912-43c4-9ba5-faa86166fb45/26549931319.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3dec5ee-9512-40a1-aff5-0a5adf325f53/list_of_books_written_by_mark_twain.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9a1296d-11ab-4131-b290-940d3a93d191/modelo_atomico_de_schrodinger.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD799 4728 bytes
SHA-256: b05de653f4297e642cb97ced4c2d3bc5630c5a9c9e422aa1a199fdf9fd3de6d5
font_01_sfnt_off0000e781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE781 2200 bytes
SHA-256: c01f1abdfdd646ec4da0b9cc7eebfa49f65bf582868fcdf767441b1ac97d7e4a
font_02_sfnt_off0000f1c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C3 10824 bytes
SHA-256: 28fdd558e3e64faf8917110899f51b2a1e2f9eb015ca0e0be206fc8b26c222d9
font_03_sfnt_off0001165d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165D 16424 bytes
SHA-256: 36e34e4fceb2cc911525c1972e1997b6c5722b4dc3f30bde2bd9c1033b58b3dd
font_04_sfnt_off00012c30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C30 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2