Malicious PDF — malware analysis report

Static analysis result for SHA-256 91670fc90ae1e314…

MALICIOUS

PDF

82.4 KB Created: 2021-04-29 12:56:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 45e0b41c689afdd1ed59eba347fe466a SHA-1: 5073430f0db83fa00c00b8b7449f1281f25542ae SHA-256: 91670fc90ae1e314845b133f381d6b43f24bc13c3e81da3647d916553e6c2448
96 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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://leonvi.ru/strik?utm_term=formal+and+informal+assessment+for+esl+students PDF link annotation
    • https://cdn.sqhk.co/migiwepi/Izw80ic/88644122900.pdfIn PDF document text
    • http://xitodefigatefuj.medianewsonline.com/kuwefavodu.pdfIn PDF document text
    • http://xanejog.medianewsonline.com/vixakozejat.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/je6WZid/bopibut.pdfIn PDF document text
    • http://nukapag.getenjoyment.net/bofezagiguxefi.pdfIn PDF document text
    • http://kufafukedexepix.mygamesonline.org/nozodufebixej.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/jcibXgg/draw_me_close_to_you_chords_hillsong.pdfIn PDF document text
    • https://cdn.sqhk.co/sonorizeluwi/Uhjibib/nufamewoz.pdfIn PDF document text
    • http://ruzopiter.iblogger.org/betadedugofusuperoji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://35b1a599-9f45-4897-82ce-59a931fc5495.filesusr.com/ugd/daca0d_4de472e910ee4b2793dc4e92a42f3a96.pdf?index=trueIn PDF document text
    • https://3ea853e4-7f2b-4fb0-9229-b04907a1e321.filesusr.com/ugd/d94095_864aed8ccb6f4c04adb6dc0e76207b5e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wozoxub/usb_bootable_software_microsoft.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/89291500402.pdfIn PDF document text
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_805d45cc222546d9b17cf2882980159b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/90072420969.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/22283158932.pdfIn PDF document text
    • http://zimoguduvelane.rf.gd/50249341978.pdfIn PDF document text
    • http://varosuvavim.epizy.com/vehicle_delivery_note_template.pdfIn PDF document text
    • http://bigazixipiw.rf.gd/grade_11_chemistry_textbook_ethiopian.pdfIn PDF document text
    • https://147762ec-90f0-4523-8579-43cb3cd17c82.filesusr.com/ugd/6c48b9_7ee6ad85e5bb4ed0ab314eacd0e1feb4.pdf?index=trueIn PDF document text
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_3fe5e8654a824d11a02af46ac4c257ef.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pukiza/vonitet.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF226 5008 bytes
SHA-256: 1bfd1c84802db954b649adc2d8dd52e1260b962ec174ee148bca1eb580a09f03
font_01_sfnt_off00010312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10312 10484 bytes
SHA-256: 7bedfe48b1c1a0fdef5806d430d77be4b9fa5a9fc179e27aac7bbaa2aa41ece7
font_02_sfnt_off00012725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12725 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7

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