Malicious PDF — malware analysis report

Static analysis result for SHA-256 7de91e24199644c7…

MALICIOUS

PDF

76.2 KB Created: 2021-04-06 20:16:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 46764a79e16a18c058fcf5a42d0f3aba SHA-1: c2c85dc5b9ffff9456b0b56ccaa7f15397cd810f SHA-256: 7de91e24199644c77f183b33677b906a855c4012d786dc0995a4812204554b8b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary focus on 'dugedepap.ru', which is flagged as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/award?keyword=love+is+on+the+way+guitar+tab+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366043/normal_601d2732f1294.pdfIn PDF document text
    • https://cdn.sqhk.co/bexuxoxabim/ggxjaha/troy_rider_knoxville_iowa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392453/normal_604921ee85b4b.pdfIn PDF document text
    • http://fiwogozugoxiget.22web.org/medical_fitness_certificate_format_for_bank.pdfIn PDF document text
    • https://cdn.sqhk.co/dikonutudibe/MnshhBv/33130058000.pdfIn PDF document text
    • https://cdn.sqhk.co/bamewimoxatu/5vS5vnF/splendor_in_the_grass_ending_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/dakizenewa/ejeghhe/bouncy_basketball_cool_math.pdfIn PDF document text
    • https://cdn.sqhk.co/nodepitow/zHUtUji/5070461207.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382781/normal_605bf2244b984.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419633/normal_60508eb425f99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443292/normal_5fd32719e0a23.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6a8c3f3f-5248-4e80-80e0-4bf2c04f72bc.filesusr.com/ugd/8b2c09_b11af665669b4ee9bf366808b77fd073.pdf?index=trueIn PDF document text
    • https://1801fa0f-56e4-4894-8452-b8e06651d4be.filesusr.com/ugd/868401_fc345403cf3544c6807596bb8449376f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/88305401-80ae-423b-8440-598905262ef2/how_to_google_sketchup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c050961-3b19-4349-9823-1853bed1f54f/white_rodgers_thermostat_filter_battery.pdfIn PDF document text
    • http://xavujoz.rf.gd/alter_ego_2_manuel.pdfIn PDF document text
    • https://cb6d8354-940b-4e05-9f1d-0150973ab277.filesusr.com/ugd/882da0_20e02af017ec43b9a4197fbb8fbb0ddd.pdf?index=trueIn PDF document text
    • https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_3e08e4a890d241929244a4ba3b16da0b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d95c007b-16a0-410b-a18b-eb0ecff5e7e4/65151007160.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e0488c5-89f6-4681-802f-e9b932dc37c7/articulo_de_la_constitucion_mexicana_derecho_a_la_libertad_de_expresion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4359ef2d-b681-45cc-b490-4a6f27139e9f/38916980186.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_off0000eb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB85 5608 bytes
SHA-256: 50e1bbd589b0e58de40b0ccfab48a3bd1a5b675dcf69661234337641cfca6814
font_01_sfnt_off0000feaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAF 10592 bytes
SHA-256: f12bb37bb9ae34f8bc3715ffa59cddcbae4d5886a2d2a68cc6d5de437a23a1a2

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