Malicious PDF — malware analysis report

Static analysis result for SHA-256 22a46f6f15e7c341…

MALICIOUS

PDF

77.3 KB Created: 2021-03-15 01:07:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 205335e10873976a7530a3ac264d6620 SHA-1: e9d62a4e5ed2e3a7880d833df3c6dc564117c557 SHA-256: 22a46f6f15e7c341181a266314f7a32d2486ab9c1bf78016abb5ba7ececb9b69
126 Risk Score

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 0.9998

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://soxebez.ru/123?utm_term=brahma+audio+songs+ing+telugu PDF link annotation
    • http://testersairf.xyz/coin_cheats_for_rollercoaster_tycoon_4_mobile7rtdu.pdfIn PDF document text
    • https://cdn.sqhk.co/dagufiwus/sU4jggc/xolamezuro.pdfIn PDF document text
    • http://meetsol.xyz/23336175319rlg8a.pdfIn PDF document text
    • http://biomanix.best/903530030734pui5.pdfIn PDF document text
    • http://rufoferapavinew.medianewsonline.com/67890912580.pdfIn PDF document text
    • http://zisapawiwako.mypressonline.com/82477738047.pdfIn PDF document text
    • http://fujigukatujewu.medianewsonline.com/bowate.pdfIn PDF document text
    • https://cdn.sqhk.co/mawejoxejobe/Ejj79if/descargar_final_fantasy_xv_pocket_edition_apk_full.pdfIn PDF document text
    • http://help-copyrightviolationhelpcenter.com/drawing_vectors_physics_worksheetw5wqf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://wegewid.epizy.com/how_to_read_aviation_weather_australia.pdfIn PDF document text
    • http://papixunaz.epizy.com/55984698547.pdfIn PDF document text
    • http://vugugemo.atwebpages.com/38131894621.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/rasoba.pdfIn PDF document text
    • http://lekowezitodog.rf.gd/puvutadudojiwerebo.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/mapakexelonekekan.pdfIn PDF document text
    • http://zikukoji.epizy.com/27702319448.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/paguwutage.pdfIn PDF document text
    • http://poxoner.rf.gd/jekubaxexipiletojosam.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e32e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32E 5288 bytes
SHA-256: 5f641e3ed58c4bbfe720b1e9b652c0a2d20dd2bdd194ada764d322840378da24
font_01_sfnt_off0000f4f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F6 3908 bytes
SHA-256: 19cd850c0383ba8264a9295a31bc57a828df984532bb451c9387bab81ed14494
font_02_sfnt_off0001039f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039F 10660 bytes
SHA-256: 880d581f8b3a087d1fb8913dae1f797d021425f5be121345bb5c7eeae65d4bb1