Malicious PDF — malware analysis report

Static analysis result for SHA-256 33a8ca624486cba4…

MALICIOUS

PDF

86.1 KB Created: 2021-03-27 22:24:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: abb87c5bdb4331a8bec003353f93bb94 SHA-1: 3e41b5e1b79087a37b82472be89a18303c8b4832 SHA-256: 33a8ca624486cba4866177e56d03df81c2541bfe80ff51e78386a3745466f525
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 0.9993

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://vilenefex.ru/aws?utm_term=are+keyless+door+locks+secure PDF link annotation
    • https://cdn.sqhk.co/seworani/igMeygd/28519818178.pdfIn PDF document text
    • http://xudiremomikuxe.iblogger.org/junenuwefevomenimefobos.pdfIn PDF document text
    • https://cdn.sqhk.co/rojozedofaf/jeRjhPS/rr_np_business_development_program.pdfIn PDF document text
    • http://itsnat.space/govesupojoo4ykv.pdfIn PDF document text
    • http://osmosiotzs.fun/xazipabuteujs5y.pdfIn PDF document text
    • http://callup.today/26646124418gwbxi.pdfIn PDF document text
    • http://mainsale.info/busedosebinovanarikifbhfjx.pdfIn PDF document text
    • https://cdn.sqhk.co/pepupiribojo/nwIhehj/81930778480.pdfIn PDF document text
    • https://cdn.sqhk.co/nenexozoz/OMIPgi4/adls_webforms_website.pdfIn PDF document text
    • http://bukuxubujexa.22web.org/51925794559.pdfIn PDF document text
    • https://cdn.sqhk.co/jepivitixiwo/hfWjahs/sword_of_chaos_furia_fatal_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/nonobepimaf/8MPIids/werukexijaragig.pdfIn PDF document text
    • https://cdn.sqhk.co/pawiwodogu/bEggihU/fonalemodatisepazozerineg.pdfIn PDF document text
    • http://pixuvuxojatob.iblogger.org/71889146208.pdfIn PDF document text
    • http://xobezised.iblogger.org/vuwatifasamato.pdfIn PDF document text
    • https://cdn.sqhk.co/molodomo/g1gjrhj/edv_photo_tool_app_for_iphone.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/dd512a30-aef2-45e7-ba67-c58c833b7ec4/what_is_hem_ankle_rehab.pdfIn PDF document text
    • http://xixujoteb.epizy.com/ruzusagexuzafinesemavobem.pdfIn PDF document text
    • http://badugumafuzalij.rf.gd/dovuxamuwitajoxapepo.pdfIn PDF document text
    • http://kuwukazisopof.rf.gd/rirosoguwomo.pdfIn PDF document text
    • http://gaxijejazaxedaj.epizy.com/81288057309.pdfIn PDF document text
    • http://dupivet.epizy.com/wekokakeletakotabakures.pdfIn PDF document text
    • http://gifesikubelazu.epizy.com/steam_workshop_files_without_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8533633f-d924-4d7c-a09d-7674acfd91d6/bozado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/680bd696-804d-4d03-a788-b2a0991e99d4/what_does_the_color_green_say_about_your_personality.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_off00011570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11570 4876 bytes
SHA-256: b7936109d385e8f53018cd3772c1c6eeaef8f68b7d536abb6d2ac0ba19514d7c
font_01_sfnt_off00012629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12629 10788 bytes
SHA-256: fbc6bb97792d6d9a271ab7e0d3f51d12ec312e497d8c736d44d93b1ba6356393

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