Malicious PDF — malware analysis report

Static analysis result for SHA-256 be299cd51d346d89…

MALICIOUS

PDF

68.4 KB Created: 2021-03-09 12:19:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7ef723f601fe3a20c13e95b7fb36ba53 SHA-1: 5b7d048a409d79d89b13d90ff290699579dac38e SHA-256: be299cd51d346d89d156df944d2520b2ff21dfd646d665b4abf48fb126e484ee
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://midufefew.ru/123?utm_term=consulting+proposal+template+mckinsey PDF link annotation
    • https://rilavowa.weebly.com/uploads/1/3/2/7/132740415/9917014.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/idlD4gj/mesozuvuletobipokazura.pdfIn PDF document text
    • https://gunobodupisar.weebly.com/uploads/1/3/4/6/134677737/fawikovimom.pdfIn PDF document text
    • http://sisowim.iblogger.org/bofinogadiwav.pdfIn PDF document text
    • https://wekosidofanepa.weebly.com/uploads/1/3/2/6/132696212/2927180.pdfIn PDF document text
    • https://vasejafarobi.weebly.com/uploads/1/3/1/4/131454155/d9d338587774abc.pdfIn PDF document text
    • https://fofafobef.weebly.com/uploads/1/3/4/3/134349457/07e27f4bf5.pdfIn PDF document text
    • https://cdn.sqhk.co/pasepizut/MhaMjc4/73337006150.pdfIn PDF document text
    • http://joziwav.iblogger.org/descargar_driver_hp_photosmart_d110a_para_windows_7_32_bits.pdfIn PDF document text
    • https://lizatupapej.weebly.com/uploads/1/3/4/4/134401074/kijuwoko.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/da1cb6f9-4270-4765-851e-756a8fb166ad/mental_toughness_questionnaire_online.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/werusajetuvazarasawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fb8c595-95ec-4d30-b278-1f2c20c2f35c/73936250977.pdfIn PDF document text
    • http://gafufumajofoben.rf.gd/retotuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cfdd10d-4cdf-4312-a93b-f67516a466c5/busolosefusefa.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/how_to_clear_memory_on_avh-200bt.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/72067373013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b7e8ce9-f7b3-4763-a555-42b211a74cc7/40202443827.pdfIn PDF document text
    • http://wesovipimamino.epizy.com/28157540022.pdfIn PDF document text
    • http://gaxosinuda.rf.gd/gariwafetibuzomusulanusas.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE19 5324 bytes
SHA-256: 65e97d03b3bce66559e22b4849057e4cc16ce8722935171a67b7faff4b25f554
font_01_sfnt_off0000e024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE024 10640 bytes
SHA-256: 6be1fc054f625ab9366eae9ce846b6947de57909af2ea6a8aa9b1576372dbc15

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