Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e932263051e7791…

MALICIOUS

PDF

87.9 KB Created: 2021-01-24 02:53:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 625ad931c8ca6926026df976f35dd17e SHA-1: 6159d65295d0023225b9c1dd29a0b6cde765de1c SHA-256: 5e932263051e77918e8abad269ee37f9ec3afa14bc1d2d4d80dcaf208d675b24
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The PDF contains a large number of embedded URLs, many pointing to disposable domains or link farms, suggesting a phishing or malware distribution campaign. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://bologen.ru/123?utm_term=snively+hot+springs+blm PDF link annotation
    • https://site-1246416.mozfiles.com/files/1246416/basara_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xobanozizesa/X9Ys4dX/libavipanimoze.pdfIn PDF document text
    • https://cdn.sqhk.co/pifixijowoka/wpidKPu/45327397919.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406208/normal_60049282a5045.pdfIn PDF document text
    • https://cdn.sqhk.co/bexoninodag/hdjdFcz/45441163779.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377401/normal_6005b1d116816.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvetuzaxi/hjhgggd/4812482833.pdfIn PDF document text
    • https://site-1175602.mozfiles.com/files/1175602/children_s_learn_to_read_books.pdfIn PDF document text
    • https://site-1178227.mozfiles.com/files/1178227/gebunipawedupabov.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/Dhd7NQ6/50896156722.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444647/normal_5ff7d2e904d38.pdfIn PDF document text
    • https://cdn.sqhk.co/fafaviwi/aygdifv/color_coded_labels_for_moving_boxes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444643/normal_5fd89ac392958.pdfIn PDF document text
    • https://site-1177683.mozfiles.com/files/1177683/sagiwo.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
    • https://s3.amazonaws.com/zetubakuz/avalon_nj_surf_report.pdfIn PDF document text
    • http://tudavoje.epizy.com/antibiotic_resistance_ielts_reading_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/authorization_form_template_example.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/commercial_arbitration_act_2010_nsw.pdfIn PDF document text
    • http://bemuvubovewe.epizy.com/apple_music_android_review_2019.pdfIn PDF document text
    • http://babokad.epizy.com/vugevoninaxukezaf.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/28050973082.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDF 5216 bytes
SHA-256: aae3be24b05c4c3ec13db727b6218f490e4288971f7270926fa5c7302af04460
font_01_sfnt_off00011169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11169 2664 bytes
SHA-256: 11942a7f08f73cae2a1e401d3dd710f309db0dffdd71e9388543208a659d9b87
font_02_sfnt_off00011ce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE3 11184 bytes
SHA-256: 32341a97545475e7c45b4302fee36d395c3cd667fbd8d14bd00575917d456d7e
font_03_sfnt_off00014328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14328 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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