Malicious PDF — malware analysis report

Static analysis result for SHA-256 43c61299569e246c…

MALICIOUS

PDF

65.2 KB Created: 2021-03-05 03:39:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9cbf7c9d0cf5c89e9ad993e9db32f793 SHA-1: 45b3e62a802ccb60352dd1e451e3ed491688e863 SHA-256: 43c61299569e246c2730f7c0b440bf6594223c96e4ed933d2b45cc140de9b151
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. It contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or malware distribution campaign. The PDF structure and embedded links are consistent with attempts to redirect users to malicious sites.

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://soxebez.ru/aws?utm_term=singer+6235+timing PDF link annotation
    • http://health-top.ru/open_office_spreadsheet_shortcut_keysqpmcd.pdfIn PDF document text
    • http://cz-nitrof.website/30698838730s4qtu.pdfIn PDF document text
    • http://bossyonlinex.com/how_to_find_angle_of_two_lineslm28i.pdfIn PDF document text
    • http://myfoxing.online/bostitch_coil_nailer_manualewrov.pdfIn PDF document text
    • http://idealica-italiaoficial.site/zonegikojumofejubadiwutuno928.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/jPEUbhf/mumeralep.pdfIn PDF document text
    • http://summer-italy.fun/begasezaradetawipovopesobxsoon.pdfIn PDF document text
    • https://cdn.sqhk.co/birugafomafo/O0djhgf/88446697660.pdfIn PDF document text
    • http://xtw2.club/zetejajoalz3v.pdfIn PDF document text
    • https://cdn.sqhk.co/vitikitema/ngjji6v/sekaworunivazitadel.pdfIn PDF document text
    • https://cdn.sqhk.co/rekubapapup/Xbihgfr/rdr2_side_quests_map.pdfIn PDF document text
    • http://dress-russia.ru/vuzuzekixiputuworogozole06bnd.pdfIn PDF document text
    • http://hookup153.online/61957385904xll94.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/6d8299dd-bd74-4b92-bb64-9a3b6f33bc3d/nipizinatufudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a240b96a-be0f-4c38-acb3-160c27f2da88/kiril.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdf002f4-a357-47a0-b1df-2edc4e3dc308/zekuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14a1f45b-0e8a-4fd4-b2c8-fa598fdb9e32/beauty_and_the_beast_sheet_music_scribd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/357c02c0-49aa-4edf-9e30-922a3a3e2022/fugonujul.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_off0000c396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC396 5260 bytes
SHA-256: 303dd904d4dd8d4edff0211c383ce70115dc78305f000bbb6415cfe8197b0500
font_01_sfnt_off0000d56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD56F 10136 bytes
SHA-256: 5adf77d1e28573d8ab68764ddb1c8eb84a24ee925b91b2ee76b93e6570cceeae

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