Malicious PDF — malware analysis report

Static analysis result for SHA-256 97c01fc2833e582b…

MALICIOUS

PDF

101.4 KB Created: 2021-05-21 18:51:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fb6d576c929148bd6664e8fecb4d462c SHA-1: 329747f10d8c61f4b408cd9051bd40acd92e5ca5 SHA-256: 97c01fc2833e582b84a8540b7932a8932188c208991e647cc2fe824b23333e5e
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 0.9988

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://mezovuduw.ru/strik?utm_term=lecciones+de+escuela+de+pastoral+para+laicos PDF link annotation
    • https://tupakebu.weebly.com/uploads/1/3/5/3/135308645/4887253.pdfIn PDF document text
    • https://fanaraligo.weebly.com/uploads/1/3/4/6/134620410/xobipaf_xaneb_wetebelobevuxi_rudewizotile.pdfIn PDF document text
    • https://jakugogafezokev.weebly.com/uploads/1/3/1/4/131437362/1802005.pdfIn PDF document text
    • https://lajanasana.weebly.com/uploads/1/3/4/3/134368101/zaxefelolo_boxolesoboperij_jekukok.pdfIn PDF document text
    • https://pukogapuwobar.weebly.com/uploads/1/3/4/3/134307851/11d22f7ddc9f17.pdfIn PDF document text
    • https://sebaderibegagib.weebly.com/uploads/1/3/4/5/134583030/6d759153.pdfIn PDF document text
    • https://vameduxa.weebly.com/uploads/1/3/4/6/134664578/babikinulidu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dugibabafod/kivaj.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/18469410893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b73c681-7f6f-41c7-a449-d5ccfe5763a8/soccer_skills_training_program.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d50291f-4ccf-48fd-8002-1366e8f4af72/puzubewajofotezet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9de53a45-9f72-42ff-88b6-37446bfc474c/what_is_the_formula_of_standard_enthalpy_change_of_formation.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/jojupuboxuwemezodokul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bc490cb-ddbb-4222-b1a8-64172fad5735/autocad_3d_blocks_bathroom_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faba8632-ff54-429e-a36f-fcb203df3382/how_to_fill_my_crane_humidifier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba42ae16-f910-4142-9747-271dc92e3a67/remington_700_sps_tactical_accuracy_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aee1a6d9-cf56-4b00-b654-5880c3b669b6/jidufetepufoniw.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/93404768485.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c94de80-0f75-441a-96f7-7c13d37dc56a/41177400033.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77e4cb2b-0df1-4881-bd6e-4504b4a4592c/how_to_compare_costs_in_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/83391378880.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ca2dab1-417f-4b5a-92d1-258082e7b9b2/mutogezewoxineman.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_off00012b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B00 4892 bytes
SHA-256: 2806442ec3cb897bf6b4750e32bca9c1f31e8f16c91b28aab32dd44c5c4961da
font_01_sfnt_off00013ba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BA1 12728 bytes
SHA-256: 09aa20bb123f583955266ea38f9296f01cad14bec859720effc70255199412b1
font_02_sfnt_off00016456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16456 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e
font_03_sfnt_off00017986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17986 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176