Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6497d2ab59986ac…

MALICIOUS

PDF

66.9 KB Created: 2021-03-22 07:36:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9bc2a7f2b4bd552988266e304aed61ce SHA-1: ec9f72eb0361d6d203a32f82822ecb08ae6433b7 SHA-256: b6497d2ab59986ac8dc7b95ff47c64d95e768240f81a6676d00f533c8e98c3d7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with many pointing to disposable domains and exhibiting link farm characteristics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to malicious sites.

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://golowaki.ru/123?utm_term=plus+size+fashion+croquis+templates PDF link annotation
    • http://xemizawufogutuf.scienceontheweb.net/86734139753.pdfIn PDF document text
    • http://tuderoba.getenjoyment.net/30445954536.pdfIn PDF document text
    • http://xolixelov.22web.org/52255022359.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406208/normal_5fe2909394fff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407747/normal_601ff17803665.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tiwojojerat.rf.gd/blob_file_angular_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2eb5c7c-fc8c-4545-99eb-edfdfecb30e0/tascam_dp-24sd_digital_portastudio_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5fa4239-e57e-434f-931e-1efc15ec32eb/how_long_to_cook_chicken_wings_in_masterbuilt_electric_smoker.pdfIn PDF document text
    • http://tajiroxajesolut.atwebpages.com/cracking_the_pm_interview_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8376b17-8ff5-4a36-ab96-c9b1a7eac8d1/past_simple_vs_past_continuous_exercises_for_beginners_2o_eso_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0d237f4-6112-4535-b960-c5014e7acae0/garmin_astro_220_extended_range_antenna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/453f3ca5-20ad-4e49-8f64-7116505bd18d/31317118116.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb46dbe9-ee77-46f0-b33e-6e379d69dc90/speed_distance_time_worksheet_ks3.pdfIn PDF document text
    • http://vekabun.myartsonline.com/58582895085.pdfIn PDF document text
    • http://tafiwepamubov.atwebpages.com/pubalemufiwujifenaxituf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01823e56-8cc0-4eb0-802c-313afbe33bd7/possessive_nouns_quiz_online.pdfIn PDF document text
    • http://xafibejijopo.atwebpages.com/what_is_time_management_skills_for_students.pdfIn PDF document text
    • http://nopugorib.onlinewebshop.net/vavewuji.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_off0000c852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC852 5432 bytes
SHA-256: 10c7b7d9cbdf9be5f01da7a4019a05d08417a791eefcd06ff6e234915a963232
font_01_sfnt_off0000dab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB1 10596 bytes
SHA-256: 618ce924d256b454761f3a6b9cfd7fb9b3c1731bd6710b6f732242e02c211296

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