Malicious PDF — malware analysis report

Static analysis result for SHA-256 631fe0f1e745cb67…

MALICIOUS

PDF

77.8 KB Created: 2021-03-15 16:59:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2b5d567f501c95b3de756119f6a46a4e SHA-1: c0b49de896a29ebeeea2689a1597ba228a9e4bfe SHA-256: 631fe0f1e745cb67205be625503124ed1d6a322960b710811cfd6499a3411232
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://soxebez.ru/strik?utm_term=what+are+the+rare+girl+names PDF link annotation
    • https://lemefinafotujux.weebly.com/uploads/1/3/4/6/134606632/5995350.pdfIn PDF document text
    • http://pakupuxojopef.getenjoyment.net/vezasadufaposuruwudosifuz.pdfIn PDF document text
    • https://cdn.sqhk.co/dijowasedop/EzhjKje/12338028633.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/ahawjid/space_rangers_2_reboot_black_screen.pdfIn PDF document text
    • http://tepugorotewole.medianewsonline.com/38955754811.pdfIn PDF document text
    • http://gamukanemafutu.mywebcommunity.org/jack_reacher_novels_in_order_of_publishing.pdfIn PDF document text
    • http://gokawojop.scienceontheweb.net/fowuluzorunizo.pdfIn PDF document text
    • https://delujopasetew.weebly.com/uploads/1/3/4/3/134399242/tozewewasag_mujutoser.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wowadepadon.rf.gd/20807682661.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90a42593-f164-4f84-ad6a-5d8bdc75facd/plt_voyager_legend_pairing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21df0755-bc1f-4046-88e4-492204402f2b/draw_a_man_test_indian_version.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/14685169436.pdfIn PDF document text
    • http://muvekalufisu.atwebpages.com/sat_sample_tests.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/online_free_logo_design_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd2dc05a-1573-4f1b-986a-15ac3a47b442/beruwidedidajimibuzobolu.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/wow_warlock_affliction_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c091222-a836-4672-802c-ae313b4b2214/vijironaxofemazalakugomi.pdfIn PDF document text
    • http://zumewozuzetarun.epizy.com/jofefisas.pdfIn PDF document text
    • http://nubusuturatiwu.rf.gd/50299603363.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_off0000f148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF148 5112 bytes
SHA-256: 5a7330897d1abd8b319161d641c35f85dd6d588909e9b09e89b06ab5733c0b75
font_01_sfnt_off0001028c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028C 11108 bytes
SHA-256: 2778a0c97c37bb46184113965be40441765a9f7ec523249876e67da84ea60932

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