Malicious PDF — malware analysis report

Static analysis result for SHA-256 31e3e56469c01ac1…

MALICIOUS

PDF

77.6 KB Created: 2021-03-10 16:08:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 35fec68218d5058b6791ffc3e3e9c0c8 SHA-1: 9d0fc23d61fd12530e09a5248f28dcc0adaa0f9d SHA-256: 31e3e56469c01ac1cf0d094adc9ba2f2757c4e36a4c0961d8976ca503f15d8ec
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://golowaki.ru/strik?utm_term=abraham+lincoln+biography+kid+friendly PDF link annotation
    • https://cdn.sqhk.co/xuxawexa/Pidjhgi/tafowinafezano.pdfIn PDF document text
    • https://sozatoma.weebly.com/uploads/1/3/4/4/134484551/e2638b6b7004c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448540/normal_6036034283ba7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427781/normal_5fe4d38b4e947.pdfIn PDF document text
    • https://lobodilogiji.weebly.com/uploads/1/3/1/3/131382226/4408705.pdfIn PDF document text
    • http://namelesssouth.xyz/wakorolozupexinejuzesorit3m9l.pdfIn PDF document text
    • http://mybatut.store/minecraft_1._14._2_unblockedy5wp0.pdfIn PDF document text
    • http://okrasote.info/dawivomuluwozixokemkz5vr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415304/normal_5fffe74c338ed.pdfIn PDF document text
    • https://cdn.sqhk.co/nowonipewo/dfTTKhj/create_your_own_unicorn_avatar.pdfIn PDF document text
    • https://rosiruwolokixa.weebly.com/uploads/1/3/4/7/134765588/5484677.pdfIn PDF document text
    • https://lafazomutege.weebly.com/uploads/1/3/0/7/130740298/10baf3f8f5e863.pdfIn PDF document text
    • https://cdn.sqhk.co/nexoratuxi/4bghOie/pacsun_student_discount.pdfIn PDF document text
    • http://laithub.pro/balupaginovuxizatirojewh1dzv.pdfIn PDF document text
    • https://cdn.sqhk.co/ritasuxa/xTIWib8/wibomad.pdfIn PDF document text
    • http://microbestdigitalmeter.xyz/how_to_give_commands_to_alexaf7ows.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408177/normal_602b3e9eb7059.pdfIn PDF document text
    • https://cdn.sqhk.co/dawajimet/iiggJja/answers._ea._com_fifa_mobile.pdfIn PDF document text
    • https://belinadojo.weebly.com/uploads/1/3/1/6/131607131/4a4aa4cbbd8b.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/c4110795-be8d-4bff-a5fc-54ce3030352c/fidagudepigo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f96fa39-8d42-4b04-9b35-e34968440aaa/rinofafepazene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41a2736d-4db9-4587-aedc-fb28bc3cd524/15342771369.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79fca7eb-7818-4ade-b657-a368d0ec37a8/64545213161.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_off0000f206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF206 5684 bytes
SHA-256: 3ba9bc3885558176de9ece748b32cc73f499f730e5dfe0e485afeca750b7ad66
font_01_sfnt_off00010538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10538 10452 bytes
SHA-256: c01e53ee79976da522c87b506c2039c12d7e01744c98e0b53baa9af63bfda0fa

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