Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e12f54c793e0b0…

MALICIOUS

PDF

98.2 KB Created: 2021-05-17 22:25:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b4539cd463ddcafcc79790bf6ac3161b SHA-1: 1926a029bc163acb3ab9436123f6c7396fd89317 SHA-256: e3e12f54c793e0b0a7b3f6a798bbc5bbc831c97e3a0e715f8ec91b16e4719a4b
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 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=algebra+1+chapter+5+assessment+book+answers PDF link annotation
    • https://betedodokadez.weebly.com/uploads/1/3/4/8/134882186/c8f7a7ca426.pdfIn PDF document text
    • https://fekebejoluxoji.weebly.com/uploads/1/3/4/3/134309121/menibab.pdfIn PDF document text
    • http://veranezos.iblogger.org/32220354734.pdfIn PDF document text
    • https://jaxenexeleti.weebly.com/uploads/1/3/5/3/135320290/wokamapajazasonu.pdfIn PDF document text
    • https://toxupenowa.weebly.com/uploads/1/3/4/0/134042648/lonolurisebeje_gefabubafufu_mazadizuziva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/443eaf77-e4d3-446f-8081-7601604aa033/zesonizajawesevuxune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9d398d2-d531-4196-baa2-d1275437834c/here_comes_the_sun_ukulele_fingerpicking_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1324872a-1624-4c7c-8f1c-bd5a0cb276e7/tanikunenokanaba.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/68589597609.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/waverley_train_station_platform_layout.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/27755261389.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/82391681644.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/104308f6-34be-4d44-8a3c-e28aa43f1300/what_age_are_mini_rex_rabbits_fully_grown.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/videoder_apk_2019_premium.pdfIn PDF document text
    • http://warozuvade.epizy.com/99471947666.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/zogozamopilopejudefupog.pdfIn PDF document text
    • http://pukafenofi.epizy.com/wasteland_survival_guide_fallout_3_quest.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000117d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D1 5548 bytes
SHA-256: 0580b3ed191800d27ebd7e896f0a6e2b6a8b334555290be20b89eda06e68c9b9
font_01_sfnt_off00012a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A9B 14104 bytes
SHA-256: fbb83ac860b24af8d3686a90461679bad9e2cbdc786a728174306a8ad97dfe9d
font_02_sfnt_off000157c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157C1 16164 bytes
SHA-256: 64041e8ed2b4f2d4adafb4bd133eafcbaec3c7a0ff20f727ef60be7507b68368
font_03_sfnt_off00016cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CD3 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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