Malicious PDF — malware analysis report

Static analysis result for SHA-256 67c1e0440b6dff1a…

MALICIOUS

PDF

82.9 KB Created: 2021-03-28 20:14:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: d9490aff6ea5f41ea6e531f58b0c7c3c SHA-1: e5e0ca9db52b8b582427941df659e2d491161747 SHA-256: 67c1e0440b6dff1a392350ef720b49fb319e3e6f6359a40b28cee79bf73e97e6
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, indicating it is likely a phishing or malware distribution lure. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the PDF structure strongly suggest an attempt to exploit users through deceptive content, likely leading to further malware downloads or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://fokemale.ru/award?keyword=d%25C3%25A9marreur+altistart+48+pdf PDF link annotation
    • https://cdn.sqhk.co/woxiwokujuwe/hagiOhg/lomosavodeg.pdfIn PDF document text
    • https://cdn.sqhk.co/rodoruwuwab/PpYwOha/bonulupuxarasawusunegus.pdfIn PDF document text
    • https://cdn.sqhk.co/bepemuno/txgfwgi/participatory_democracy_examples_today.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://uploads.strikinglycdn.com/files/64de8899-71cd-464a-9c24-7715a36efa13/soduxagabakige.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcfd7415-a2b0-43c7-9cad-b612c5cfc411/lakonozupatavekugilib.pdfIn PDF document text
    • https://28481333-1ef2-46fb-8ebf-d56c3f24acbc.filesusr.com/ugd/314c35_bdbb48e5fa334593bc7596aec279dd39.pdf?index=trueIn PDF document text
    • http://soburuwukipo.epizy.com/messenger_pc_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/786a567d-1141-4d39-b601-f0670ed1d377/72711510975.pdfIn PDF document text
    • https://c2245d91-bd3f-4016-bed3-1da34bcfd793.filesusr.com/ugd/9a652e_b4bc6c8b770a409ca73b7339640eb4af.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fixararololu/citrix_netscaler_mpx_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/full_marks_guide_class_8_science.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e41a5fa-762b-4ec8-be72-1bf823163a44/stack_on_woodland_40_gun_safe_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49b644ce-a5a7-4ce1-830f-6e78a5712565/6623298330.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/70264383499.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfa88590-936b-403a-aecc-a6339a363f8c/principales_tcnicas_de_recoleccin_de_datos_en_investigacin_cuantitativa.pdfIn PDF document text
    • http://gonumarimemax.epizy.com/miwejemapesotejoriw.pdfIn PDF document text
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_ba96f9158fef4984b51386ee32bd689d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/342bfd78-6f4c-4e76-a7e9-dd35065af8b8/poririxisowexudiw.pdfIn PDF document text
    • https://37991ae0-d72b-4ccf-bf90-288dedd591e7.filesusr.com/ugd/041b56_ee5ba6ad383f4ce089cc09f65783aa35.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FC 5276 bytes
SHA-256: 5565668df4608d54867da27aac0386f765bfa59229c18e92fda352510ff077e2
font_01_sfnt_off000105ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AE 12960 bytes
SHA-256: 93b78523f4c44ac3f2f20f898b7d5eb7e3ac340c5311293f1558674e4553ddda
font_02_sfnt_off00012eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EAE 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3