Malicious PDF — malware analysis report

Static analysis result for SHA-256 8414b4bf594632ec…

MALICIOUS

PDF

110.5 KB Created: 2021-04-01 05:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 7e1f0d18613d30380e18217afd3207b1 SHA-1: 2015377ebabbcc52637ee27afc499e674f5b0c74 SHA-256: 8414b4bf594632ec435c12a57dc7fa0397b56dbc8a22f76192a1d127c7cafccd
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and a phishing/malicious document. It contains numerous external links, many pointing to disposable domains, suggesting an attempt to drive traffic or host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/aws?utm_term=what+does+30-06+mean+in+a+rifle PDF link annotation
    • http://nukels.xyz/163431810614nft7.pdfIn PDF document text
    • https://liloxowilobo.weebly.com/uploads/1/3/4/2/134265539/bogudotageworom-janimaxugaviwa.pdfIn PDF document text
    • http://worameruvejaka.mywebcommunity.org/sql_interview_questions_for_testing.pdfIn PDF document text
    • https://rajilogibakew.weebly.com/uploads/1/3/5/3/135326989/f8053e1dc7.pdfIn PDF document text
    • http://muzhskoizhurnal.ru/72775068597udoo5.pdfIn PDF document text
    • http://basumoxivor.sportsontheweb.net/ahle_hadees_books_free_download.pdfIn PDF document text
    • http://lerob.info/sigugadituzupuxiduxzt.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/ge_healthcare_service_number.pdfIn PDF document text
    • http://fb-copyright-help-from.com/tanojakavolotokumajavef46m1.pdfIn PDF document text
    • https://finolija.weebly.com/uploads/1/3/4/6/134625313/kesubodedofuri.pdfIn PDF document text
    • http://gebigulexejo.sportsontheweb.net/rupubazilekafutavinij.pdfIn PDF document text
    • https://naxetiluwe.weebly.com/uploads/1/3/1/4/131483002/261a32bea.pdfIn PDF document text
    • http://ufenmac.com/810111433883k4ln.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/fc1d382a-157a-4eb4-8f33-8be9805771d9/lasenizifebagesirudema.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/395586b4-5c2a-43d9-98e5-60b0c7bc7ba8/how_does_the_stock_market_work_simple_explanation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a39cd9e-00ed-44ec-873a-85b8580d8c40/378161486.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c358221-6b14-47ec-a9e5-8870ab6770b5/970906388.pdfIn PDF document text
    • http://fadezanunadafik.myartsonline.com/39239515375.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc5d8a93-3fa3-42d5-9ddf-fc54d0520bfd/742531707.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15918 5652 bytes
SHA-256: 959e088bc38d51da756f2e1f70413c17df90d13f2ed94a526d7631f42cefaeca
font_01_sfnt_off00016c38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C38 13180 bytes
SHA-256: 39b1e158e5860abe3530620bcb382c50b860b05ed57f0fa247bb2bc516b5aece
font_02_sfnt_off000197d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x197D5 16060 bytes
SHA-256: 713933360072c9d59346590fad668f98c3603c6d2b72ed941ce85481f6af0b74