Malicious PDF — malware analysis report

Static analysis result for SHA-256 142cca65773a3394…

MALICIOUS

PDF

79.6 KB Created: 2021-03-18 18:45:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a35daa3ff72fd21ad6f52595638b4552 SHA-1: e25346af548069ef916840f5a304d37dfd13f771 SHA-256: 142cca65773a3394d249737b71d805b83c4c0512a791215620115973e3452a88
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 0.9996

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://soxebez.ru/strik?utm_term=honeywell+th5220d1003+manual+pdf PDF link annotation
    • http://soluzixod.66ghz.com/who_manufactures_thermador_refrigerators.pdfIn PDF document text
    • http://nimidarizul.22web.org/66076650853.pdfIn PDF document text
    • http://somenem.iblogger.org/34677398062.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/4edd49ee-4d3a-45a2-addc-2955fd6fd7d8/28718467114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6842ab9-c066-47f0-9d05-cde51ca8a21f/62697370904.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/13903533755.pdfIn PDF document text
    • http://xatidewivi.epizy.com/27773252189.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a11bf26-adec-4b42-96de-fdd0b415cc92/kaxejapeduniligumiromu.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/52612053237.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/64290522060.pdfIn PDF document text
    • http://zividovapajawuv.epizy.com/njals_saga_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1a5c53b-adb2-4c7b-9ac5-ca266000f9b3/naval_correspondence_manual_point_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/metal_gear_solid_3_snake_eater_boss_fight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9393b7c7-2e54-4a96-99af-61ad801c34a7/16871017534.pdfIn PDF document text
    • http://gugamofizuxeg.epizy.com/dalaraguludiludokotujur.pdfIn PDF document text
    • http://nonuzefibiwoz.epizy.com/avengers_endgame_trailer_2_piano_sheet_music.pdfIn PDF document text
    • http://janutozekim.epizy.com/xazetabulatizejiw.pdfIn PDF document text
    • http://rujujarorimepa.rf.gd/bokivapo.pdfIn PDF document text
    • http://verirajoxa.epizy.com/39562508922.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD552 2752 bytes
SHA-256: 619bc7fd3a6524beb57032254444c95856aaf8d3bc80faeb9d7d4a68434d15d9
font_01_sfnt_off0000e0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D7 5776 bytes
SHA-256: be4ae58fca494a51b3eda76c356a56fa8aa75fc67913fe8c676944d6a2fc7de8
font_02_sfnt_off0000f483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF483 10792 bytes
SHA-256: e781be2a23c2052b96a62afa395a02bccdb79d456daa263e23e9f638958d18df
font_03_sfnt_off00011983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11983 17200 bytes
SHA-256: 3859b4fb4c111a8166f221851b7a6a0c5b72c84ef341dba3998c04c52e573868