Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd97438e62279b12…

MALICIOUS

PDF

72.4 KB Created: 2021-02-28 21:29:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2b4bdb688e2f0808ef6f4ffdb6ec58df SHA-1: b1f94f9490d6001cf8f9c5e554b7c989bf034b6b SHA-256: fd97438e62279b1213841339a3b7eb95d3a6fca56989d531d3f578ca0e77d19d
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, with a primary one pointing to a suspicious domain that appears to be a link farm. The ML classifier strongly indicates maliciousness, and the document's structure suggests it's designed to redirect users to potentially harmful content, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://maypoin.ru/award?keyword=how+to+power+on+tablet+without+power+button PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421630/normal_601e50b7c3dc2.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/dmhfjg8/gun_bullet_shooting_keyboard_themes.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/hiOichi/43442938916.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450141/normal_602a7392759ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470380/normal_5fdb1518cc38c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421224/normal_600b4c9837a02.pdfIn PDF document text
    • http://maxidadikegi.iblogger.org/45082489705.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403816/normal_6035c70b39451.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383698/normal_6010d4293d00d.pdfIn PDF document text
    • http://galobesunin.22web.org/biggest_weakness_job_interview_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390069/normal_5fede98e78b13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380078/normal_60269fed4be47.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470985/normal_5fefbfdb45f32.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://movafomuwexowix.epizy.com/nikon_d5200_camera_accessories.pdfIn PDF document text
    • http://saxogif.epizy.com/92393806861.pdfIn PDF document text
    • http://xozodede.rf.gd/how_to_fix_an_air_compressor_pressure_regulator.pdfIn PDF document text
    • http://vowoxemaxevajo.epizy.com/96354248080.pdfIn PDF document text
    • http://mebofubanu.rf.gd/factorisation_worksheet_class_9.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF38 4920 bytes
SHA-256: c599e094719c51d64e8012b8c087d2d47ce6a51d7d7a8e20cf7bf991aba349fd
font_01_sfnt_off0000eff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF3 10660 bytes
SHA-256: 813d591a09d7c3ffce9eec3692ad2910d046933d043e8146019b678ae2476802

Open this report in the interactive analyzer, or submit your own file for analysis.