Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef0ed86c2058ee96…

MALICIOUS

PDF

100.0 KB Created: 2021-04-02 11:27:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: e824a3dd49278e6d098ea5a58ca0a3f9 SHA-1: 1d149c4df1d0ee73433ec9a40ad36af65894149c SHA-256: ef0ed86c2058ee96324cff1761f2f4ad614334c5f8626916d6f1bb52ac197391
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains, indicating a link farm designed to obscure malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/award?keyword=alphabet+arabe+debut+milieu+fin+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407986/normal_602abcc763158.pdfIn PDF document text
    • http://lukiduxipapep.mywebcommunity.org/nekazejud.pdfIn PDF document text
    • http://nopuvobetag.mygamesonline.org/sta_rite_pool_pump_motor_replacement.pdfIn PDF document text
    • http://kovuzaxaf.medianewsonline.com/bomatukapigaginikoxigu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454984/normal_5fedd7484d760.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409118/normal_604ca793ab847.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/57625006142.pdfIn PDF document text
    • http://bitujiduruv.myartsonline.com/78164606493.pdfIn PDF document text
    • http://farovosodiwes.atwebpages.com/leneriv.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/76835705780.pdfIn PDF document text
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_76730254d7d94911a1675dbc417b24ed.pdf?index=trueIn PDF document text
    • http://nijarigu.onlinewebshop.net/bunariviba.pdfIn PDF document text
    • http://vidugozu.atwebpages.com/84378973134.pdfIn PDF document text
    • http://nokejufesuw.atwebpages.com/21790105806.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/relulu.pdfIn PDF document text
    • http://lopakesuzuw.atwebpages.com/highway_geometric_design_lecture_notes.pdfIn PDF document text
    • https://bf130ee1-1463-4c69-9604-1b23772ced92.filesusr.com/ugd/b4609a_d0448ac4e4cc43fabcf14bf4b1b26f3e.pdf?index=trueIn PDF document text
    • https://f0d491a7-7d72-4eea-bbd3-72ad31f48a9a.filesusr.com/ugd/1acdab_cd136e20d41d428896bea11cb93b726b.pdf?index=trueIn PDF document text
    • http://tulifal.onlinewebshop.net/flybe_boarding_pass_on_phone.pdfIn PDF document text
    • http://xolevusafo.myartsonline.com/digesamarukipawuf.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00014a09.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14A09 31456 bytes
SHA-256: 3992e1cc50a201ccbd7bfc37fe78f4022b5f9f2fde759f4dc2038f2c8f6c54d9
font_00_sfnt_off00011069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11069 5232 bytes
SHA-256: fbb5e1592a2f2292a7d13cabce79e07e5cc4cc45bc5a3b1cbdf298dfbed05acf
font_01_sfnt_off00012201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12201 12720 bytes
SHA-256: e1d908476bed32ca26dab11caea3c8cffd35bdb1b5d3cb0f2356d0b66278f538

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