Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdd7cd480c62b98d…

MALICIOUS

PDF

380.2 KB Created: 2021-06-07 20:20:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 25e3800d8f90fa5c3e7a807b53f2d1ef SHA-1: 92e2cfd6fd59219b32b839a91caf79b4df1f8dbb SHA-256: bdd7cd480c62b98d3a49df2decb19ac102c27abc04b527013e3b9793aaeb2342
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a fake browser/software-install lure. 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 0.9744

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://wastran.ru/pbw?utm_term=night+chapter+4+questions+what+were+the+objectives+of+the+medical+examinations PDF link annotation
    • https://nitonigizumori.weebly.com/uploads/1/3/0/7/130739712/b3e359999ec7.pdfIn PDF document text
    • https://nezafilajulimef.weebly.com/uploads/1/3/4/4/134481311/344210.pdfIn PDF document text
    • https://sivamodinuna.weebly.com/uploads/1/3/4/7/134762665/kavodoravuwa-wofawazon.pdfIn PDF document text
    • https://xoliguzi.weebly.com/uploads/1/3/4/2/134265359/pekodonived-nuwokebe-dituzodetej-dowotajosekuv.pdfIn PDF document text
    • https://xonarupitowij.weebly.com/uploads/1/3/4/6/134617661/jejesekubuwot.pdfIn PDF document text
    • https://mimoleratamofip.weebly.com/uploads/1/3/4/5/134500060/0ce8637df.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/ae3f08b4-d72b-470a-833c-b042e45e0ea1/23020162548.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93578f1a-5cd8-41ea-9019-80a16bcdb3a0/77182125561.pdfIn PDF document text
    • http://kapetipubi.pbworks.com/f/flexible_work_schedule_agreement_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5ea1d8d-2d61-42a9-a483-55af210c068f/8480685715.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fed6ddd-6edd-4598-bc55-2a26b386b368/why_is_my_hp_deskjet_1510_not_printing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20de361c-2e23-472a-8b63-327b9431d1e4/tiledolatedanug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b4c98e7-4a22-48f3-acf7-9cdceafd1c98/64419889704.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95f7c83c-48db-4a8b-99dc-9d51b721cc82/26967145056.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68561be5-6126-4c5b-8f17-6601e15ce51e/bamukokuwokiliba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4afec3a-9807-410c-a380-c7229566cf98/what_do_colorful_birds_mean_in_dreams.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d4b383e-4b53-46c4-bf9c-3edd0f5304c3/how_to_read_your_sensus_water_meter.pdfIn PDF document text
    • http://kuperuxowix.pbworks.com/w/file/fetch/144795384/fatih_harbiye_kitabnn_roman_tahlili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d781faa3-0e6e-4d13-87ab-febd50b57f3d/jevinumapexepulo.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_off0005a656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A656 6188 bytes
SHA-256: b97f2ee38ededd19ebd2969d42c657aa2479a08ae59be3d115fb7bef40636d2a
font_01_sfnt_off0005bb69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB69 10676 bytes
SHA-256: 808139e76f21a92830607efd07147e2b25a13d8dc5f003afdea6b70d66e9189c

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