Malicious PDF — malware analysis report

Static analysis result for SHA-256 4410bdc711260c2c…

MALICIOUS

PDF

78.5 KB Created: 2021-04-05 00:23:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e10e81e64024d7f66d1cd06ce4ff6bd2 SHA-1: 8d524bb709557aa9176c69b613f9bee7306ea62c SHA-256: 4410bdc711260c2c0d8e896f291ba5918651dc61164dc1ef6ace9e730f61e52c
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'midufefew.ru/award', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to 'conversation anglais francais pdf'. No scripts were extracted, but the presence of an external URI and the ML/ClamAV detections strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/award?keyword=conversation+anglais+francais+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445550/normal_5ff12774b0a13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368751/normal_6036ae9583ffe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486975/normal_5fcc3dfe27ea2.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/0bd71ce0-8c67-428e-ae83-02aced76f42e/malenajiliwobu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/391b1a2f-a6e1-49f2-9436-9cc457a2422c/82157420025.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/2004_fleetwood_sequoia_pop_up_camper.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/bokatowe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/362aec3d-0b78-4501-a564-c7dbaad13852/xexizusaje.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/36299058176.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5067e29-ee4a-45cf-8c88-b5094ebf6cf3/financial_shenanigans_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fc2cafc-92a0-4fca-a4ca-265124e40439/hp_8000_elite_pci_simple_communications_controller_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c13c0c02-1f7b-43ab-bc07-4b4927139e67/ff16_ps5_release_date.pdfIn PDF document text
    • https://s3.amazonaws.com/dagasopones/circle_theorems_gcse.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/word_of_the_year_2020_oxford_dictionary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ebf388d-4d49-4929-aeea-ddab8d49c6c3/what_training_do_you_need_to_be_a_real_estate_sales_agent.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/15029843378.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/voramavasilubupoxulu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25357291-22a7-4dc8-b7b0-ec55aff46f6a/bhagavad_gita_chapter_12_meaning_in_hindi.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E5 5288 bytes
SHA-256: 2014f8c2d47497dec0a2c02a0f87bc0d2d260d1512c3a2b3eff976afaf498253
font_01_sfnt_off000103f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F8 12660 bytes
SHA-256: 7eeaa180743fa90a02aa7dd87a70e143cd1ff5877cef703b76ab57bbc28235ce

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