Malicious PDF — malware analysis report

Static analysis result for SHA-256 a295c51a5426feaf…

MALICIOUS

PDF

68.8 KB Created: 2021-02-03 00:36:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 05c599b7103f783759d2a8aaa6b47e5a SHA-1: 107ef1ec76c08bd2660f3ba328658b6052082c20 SHA-256: a295c51a5426feaf0e26870352465957a68404a70f97c989fd1e6ad59c1a626f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm designed to redirect users. The PDF structure and the presence of external URIs suggest it's used as a lure to direct users to potentially harmful content.

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://baarspo.ru/aws?utm_term=pacify+her++free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4491151/normal_5fcee500ddf55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497646/normal_6011383b0a5ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421477/normal_6002ef2b2bbdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417653/normal_6015dc0001228.pdfIn PDF document text
    • http://kebotup.66ghz.com/angular_2_local_variable_in_template.pdfIn PDF document text
    • http://dazomasuw.22web.org/bizurekuxagidup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474736/normal_5ffcf4f2e0518.pdfIn PDF document text
    • http://fumerox.iblogger.org/naruto_online_mobile_tencent.pdfIn PDF document text
    • http://xutarima.22web.org/zoom_hd_camera_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jefitanebigovun.rf.gd/comparing_decimals_worksheet_for_grade_6.pdfIn PDF document text
    • http://nadezuj.epizy.com/beautiful_baby_photo_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/vmware_esxi_trial.pdfIn PDF document text
    • http://zedotedifajo.epizy.com/wordscapes_level_1427_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/south_america_map_blank.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/ciena_5150_configuration_guide.pdfIn PDF document text
    • http://wizidiz.epizy.com/management_system_project_report.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/fools_garden_lemon_tree_karaoke.pdfIn PDF document text
    • http://najefitisefema.epizy.com/substantive_audit_procedures.pdfIn PDF document text
    • http://tovujopojat.epizy.com/chevrolet_ss_service_manual.pdfIn PDF document text
    • http://zewipurorafe.epizy.com/pitevaxaxibozesusizigu.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_off0000d1c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C2 4864 bytes
SHA-256: 565199cb537d6bb217e257422aa4e06a113dfa1b58b71437ada73549b79f98bd
font_01_sfnt_off0000e254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE254 10412 bytes
SHA-256: b4c206f9f12a668fb9c022e4560db87402f79af08146f748978f7b219974dd8d

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