Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b3f946254f15a9f…

MALICIOUS

PDF

164.7 KB Created: 2021-03-08 06:30:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 732f49c2074d4e7692ec13195ceb901f SHA-1: da760676cde4c863c655b8a3852733e55937d0f1 SHA-256: 3b3f946254f15a9f8b79c7cae43a1b9dbebc1877e6af4d170b88d0eb0f0cd916
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 one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it is designed to redirect users to potentially harmful websites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/strik?utm_term=star+wars+edge+of+the+empire+careers PDF link annotation
    • http://folejaf.mypressonline.com/wings_of_fire_graphic_novel_1_preview.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368250/normal_5fcebd5f189f9.pdfIn PDF document text
    • http://metoxegid.mygamesonline.org/lapuwobawatumenigukinup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390382/normal_5ffc31ce3a868.pdfIn PDF document text
    • http://mateguwokalidub.getenjoyment.net/xekumorovedo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/29f979c5-f659-4b07-80e9-c3fcc1d6a7bf/winchester_model_94_rifle_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0064567a-ddfc-4ea9-b639-9685710ae8ea/79439296530.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/bsa_medical_record_form.pdfIn PDF document text
    • http://babematalal.epizy.com/peptic_ulcer_dietary_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a91d097f-7ce1-4b58-a925-0a704df930ad/zejopufewekadisazedif.pdfIn PDF document text
    • http://fumonabuda.rf.gd/62175520386.pdfIn PDF document text
    • http://jizonizop.rf.gd/sarad.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/88088115513.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19a5e4b2-a7a3-4592-b66a-7f1d13d767dd/myles_munroe_books_on_prayer.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/bloody_roar_4_pc_game_exe.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/tabizejomizo.pdfIn PDF document text
    • http://satujiratof.rf.gd/marep.pdfIn PDF document text
    • http://dobupefibukin.epizy.com/ansi_encoding.pdfIn PDF document text
    • http://zafurug.epizy.com/jopubofalipenoze.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_off00024b14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24B14 5732 bytes
SHA-256: e488821e1b9caade7a59ada054e2ba2f98f259acab3823397aedebf020571ae1
font_01_sfnt_off00025e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25E87 11536 bytes
SHA-256: f4e905ce027d5f6f4532eb8f504df01a2e799b782c0b21628b0d56c897b7325f

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