Malicious PDF — malware analysis report

Static analysis result for SHA-256 94bdf755b986fbfc…

MALICIOUS

PDF

85.4 KB Created: 2021-03-19 16:57:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f9a99f740afcfe38d897422f012a330a SHA-1: b07af7f5a4eff1dee86db0b4e9aa8e4b45f231b9 SHA-256: 94bdf755b986fbfcda61497880abe36f09dd9d94aa79687f69f00500cc93d302
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

Heuristics 5

  • 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 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://dugedepap.ru/wix?keyword=daniel+duval+prayers PDF link annotation
    • http://favovuzoxegavix.22web.org/mechanism_of_antipyretic_drugs.pdfIn PDF document text
    • http://kolomata.ru/81664365014nzlh.pdfIn PDF document text
    • http://olivamebel.com/61954630487pjymd.pdfIn PDF document text
    • https://xefomivor.weebly.com/uploads/1/3/0/8/130814633/jivixasenilawufi.pdfIn PDF document text
    • https://zunovuxosuseso.weebly.com/uploads/1/3/4/4/134497136/gexakadur-binidofipa-sobiw-petejexesapasa.pdfIn PDF document text
    • https://wofexajolevesi.weebly.com/uploads/1/3/5/3/135302186/kufugenatepepo.pdfIn PDF document text
    • http://dasaburaxad.22web.org/9470678179.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/99141890-dec1-43d0-9c52-e1b15e2a37da/98879841486.pdfIn PDF document text
    • http://nefedelabemusu.epizy.com/biological_oxygen_demand_calculation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc7c789e-60e0-4acb-aad9-844392f7823c/kepulagejamolusuw.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/72339404715.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0eb3a82-22fb-4a7c-b705-467457ba6093/8291036336.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/pemeriksaan_coombs_test.pdfIn PDF document text
    • http://kemawugaputawa.rf.gd/carbohydrates_biology.pdfIn PDF document text
    • http://fubatasofofezo.rf.gd/68305707602.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/laxeja.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/gaganibekusijijiwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ab38c1d-472d-4e42-9d87-65e7dd0fb76a/us_motors_1081_pool_motor_start_capacitor.pdfIn PDF document text
    • http://wadatenut.rf.gd/99452631009.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58033446-0da8-4aff-a87b-366ed366c135/56259153952.pdfIn PDF document text
    • http://vosowetawevu.epizy.com/multi_store_ecommerce_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/data_structures_and_algorithms_using_java_william_mcallister.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_off00011144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11144 5116 bytes
SHA-256: 79be4e89fa347499b053e9c29cdb506ba3710a0e1fd85bcb2024304fced6d1f5
font_01_sfnt_off000122d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D1 10812 bytes
SHA-256: 31bf808f1fc997f2f76219a6455e72052c70c531ecc2542b5a6828e52e304f98

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