Malicious PDF — malware analysis report

Static analysis result for SHA-256 563e1d47f3f91cc8…

MALICIOUS

PDF

76.8 KB Created: 2021-03-05 04:11:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 10d2453a5b8145dd160da44fc7adb4b3 SHA-1: 4b1b3d3c07afd694382346476776af0fb02019b6 SHA-256: 563e1d47f3f91cc825c0cd3f9fb7c1701fd5b7ea560cc76f535e6521d9973fb3
244 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 a machine learning classifier, including critical alerts for linking to known malicious redirector infrastructure and participating in a link farm. The embedded URLs suggest an attempt to direct users to external sites, which is a common tactic for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/aws?utm_term=strongman+training+program In PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/tBojjhc/twisted_wonderland_manga_anthology.pdfIn PDF document text
    • https://cdn.sqhk.co/nasanoroge/hgrgdg6/bedwars_server_name_and_ip.pdfIn PDF document text
    • http://regsenatvumen.website/how_to_replace_a_whirlpool_washer_lid_switchww8vz.pdfIn PDF document text
    • https://pibubeje.weebly.com/uploads/1/3/4/3/134374065/98cb31851e8.pdfIn PDF document text
    • https://bimovuwun.weebly.com/uploads/1/3/4/7/134727863/3190998.pdfIn PDF document text
    • https://dalenorilesa.weebly.com/uploads/1/3/4/8/134858788/fusifiditeme.pdfIn PDF document text
    • https://werafapotavide.weebly.com/uploads/1/3/0/9/130969473/vidajuganabi.pdfIn PDF document text
    • https://widafesisitix.weebly.com/uploads/1/3/5/3/135321065/mujifijopumo.pdfIn PDF document text
    • http://trixy-matrix.space/cheetah_running_short_videoc2q3g.pdfIn PDF document text
    • https://cdn.sqhk.co/tigixexaxi/9jihigc/pipobivabetutixex.pdfIn PDF document text
    • http://francobusiness.com/bazepipebafugunoduxus13tli.pdfIn PDF document text
    • http://mainsale.pro/skywalker_12_trampoline_weight_limitdvw7b.pdfIn PDF document text
    • https://cdn.sqhk.co/baxafapunubi/Okowujd/98421065661.pdfIn PDF document text
    • http://about-fb-support.com/how_to_build_a_worldysevh.pdfIn PDF document text
    • https://cdn.sqhk.co/nobutowug/iTjicjh/62693061093.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/10e2d283-7d86-4212-b05a-5681eb3d942c/74629290746.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2a880a4-2e07-4b49-9d20-1082f7b8e7a7/84282276539.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb39ce58-6faa-450f-98d0-cc67ac2a012a/ms_word_templates_letterhead.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8346cd3c-4e1e-41a0-a08f-5973d73beb2b/wolowupedali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfc3e3e8-935c-43b3-9672-d0e00a6657bf/what_is_the_mileage_of_yamaha_fz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bab5ecc1-943f-409e-9048-279fca56771f/99843250231.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de022cee-9510-4a67-9b66-399af5e245bc/12495162795.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c968a120-3e37-4fa9-b62d-4323afdabd0a/can_a_healthy_person_use_oxygen_concentrator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a39b806-a824-4507-b3b5-59cd24ae8a80/94070891076.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ff52868-8dfe-4bbc-995a-8413f555a5e8/nutenapup.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_off0000ee95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE95 5032 bytes
SHA-256: 9a12cf4a435667e34aa569cecdeeb5486b3637558f7612db6d29e2e8c23d312c
font_01_sfnt_off0000ff99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF99 11216 bytes
SHA-256: e96d8a34194b37e181fdd92402ca535e0965e0a1fd6e64f9f9ce7af1cdc0e1be