Malicious PDF — malware analysis report

Static analysis result for SHA-256 10e811efc405cfd6…

MALICIOUS

PDF

78.4 KB Created: 2021-05-05 16:03:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 96f717deed92cc9d4834a5c9391619d6 SHA-1: 5b25f83c936166c05c896ca45fd66a6610faa2fd SHA-256: 10e811efc405cfd68eb8bbc7c53f224b2f195a17c537665e232e4e6c6376a806
186 Risk Score

Malware Insights

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

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 0.9920

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://soxebez.ru/strik?utm_term=tablas+de+integrales+completa PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4451365/normal_5fed97122747a.pdfIn PDF document text
    • http://uspeh.icu/how_does_dbt_therapy_works9cqj.pdfIn PDF document text
    • http://okrasote.info/nerezabilikopabamipanasulzhrll.pdfIn PDF document text
    • https://wokonupojelofa.weebly.com/uploads/1/3/5/3/135351156/ruxabulororijo-kifutukupaxu-ririkupo-butovemet.pdfIn PDF document text
    • https://sizomejuxitiz.weebly.com/uploads/1/3/4/7/134748976/4027414.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480162/normal_6057ac4881f2b.pdfIn PDF document text
    • https://gukabezifom.weebly.com/uploads/1/3/6/0/136051166/8b1aad3e.pdfIn PDF document text
    • https://vukosigubew.weebly.com/uploads/1/3/4/8/134860762/20460886db2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382639/normal_602e05afe169f.pdfIn PDF document text
    • https://dixoparogazasa.weebly.com/uploads/1/3/1/8/131871726/825bafe2ba9b7f2.pdfIn PDF document text
    • https://litusavetedi.weebly.com/uploads/1/3/4/4/134445261/jexav-kizuburadi-rogorokerinura.pdfIn PDF document text
    • https://fisupipegapug.weebly.com/uploads/1/3/4/5/134515512/ropel.pdfIn PDF document text
    • http://deromgroup.com/80636778210aus2f.pdfIn PDF document text
    • http://circleshtang.xyz/basic_introduction_of_c_language_in_hindi1935q.pdfIn PDF document text
    • https://kojemugolipoxo.weebly.com/uploads/1/3/4/7/134729864/5eb8f8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482860/normal_60541a7055fcd.pdfIn PDF document text
    • https://luwozupewudaxu.weebly.com/uploads/1/3/1/3/131384663/zomeli.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412908/normal_5fccc21b409a6.pdfIn PDF document text
    • https://buzowupe.weebly.com/uploads/1/3/1/4/131483044/2bcb8d.pdfIn PDF document text
    • https://revunipaletofux.weebly.com/uploads/1/3/0/8/130874393/9991774.pdfIn PDF document text
    • https://xaxarudo.weebly.com/uploads/1/3/0/7/130740130/9963225.pdfIn PDF document text
    • http://peuly.xyz/jugifikonigyvoyv.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/wezukep/7326445109.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/34566420908.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/yard_machines_lawn_mower_bag.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/gijutap.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/vazaremezotugagisebobuwum.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD585 5484 bytes
SHA-256: da22a351782665c5fc01602ad828098ddaac184724a7442f9a475ca5f2f24bcb
font_01_sfnt_off0000e806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE806 2184 bytes
SHA-256: 64572888870b9d82432154edb418e41c8e881f1d92178375a4b46fdd5f84da48
font_02_sfnt_off0000f168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF168 10684 bytes
SHA-256: acb23ce73a36e701547ab5ac4746b4ea1e3340ad6d2bff68ac1f836ca8328f4b
font_03_sfnt_off00011582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11582 16172 bytes
SHA-256: 288e90767fc457914ac3f761b44aaed6a1dd0366a6c385c3c13671c4b1510d15