Malicious PDF — malware analysis report

Static analysis result for SHA-256 aad4d7bc8150495f…

MALICIOUS

PDF

105.2 KB Created: 2020-12-27 22:50:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 558e2a14d7f1f702381a910b281516fd SHA-1: 3af1e2f984547e76dce0fb24740455bb91514893 SHA-256: aad4d7bc8150495fa15aa2cffad20ef83a7240570f5fcfca8c0eed96c47dd505
156 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 0.9989

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 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.
  • 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://traffine.ru/strik?utm_term=hoop+messenger+online PDF link annotation
    • https://xaxexapiro.weebly.com/uploads/1/3/1/4/131453807/lojebekaxabevag_webegud_temorogedetita_sejorajenuloni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369631/normal_5fd716127958b.pdfIn PDF document text
    • https://jizenovu.weebly.com/uploads/1/3/4/6/134682428/32c965.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453553/normal_5fcf7c8dcac58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369168/normal_5fbf2994eb15a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465565/normal_5fc59fc16ef69.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/runanutazixab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cfc9a74-d985-4a66-88a6-bb7b6be5530e/red_giant_serial_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c0dd07e-ae21-481f-8af9-81ca4bb4218e/eagan_library_hours.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cd32fb7-814e-4b77-a35a-7962d4d86a37/16078978462.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/jevuguwozuwetuvagaxegalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54963cf8-439a-4f7e-bdb7-137ed5965a74/carta_poder_para_llenar_online.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/birla_cement_dealership_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9ad6d5b-980e-4c29-b862-80681cd23340/naturalization_certificate_number_on_passport.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12455324-a869-465d-a32b-3c833e7e2362/17382594145.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/53951344258.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4A 6864 bytes
SHA-256: 7ae164a73ee3e4de9047e294222b9c53e7df13250ab0f7e59e0ac30a4623017c
font_01_sfnt_off0000eea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA2 4892 bytes
SHA-256: 60fd2e091968bcb4e2fbc59e7cd45c3a2f4d24b038d6bcf30ea3890211e2bf4b
font_02_sfnt_off0000fef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF3 6168 bytes
SHA-256: 9e43553fe10655dea8298e07d6deda50e71efb4bed706ba8ef852340c734e74f
font_03_sfnt_off00010dd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD1 26468 bytes
SHA-256: f9b638c2f77eb393ca94ef174c701a7cfee732abf4ac09a4939c3f813ee50388
font_04_sfnt_off00015827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15827 11460 bytes
SHA-256: e68cec35224d1cc4a8671890e9547d314344fd6630cea4bcbf7e4abf2c74a9e9
font_05_sfnt_off00017f9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F9B 16656 bytes
SHA-256: 9616d8e10a6a5934afa35992ed4e31af90e0c957d96e8d5f1eafede56c53b825

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