Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7112ca289c6d253…

MALICIOUS

PDF

94.2 KB Created: 2020-11-27 19:47:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5b4e257d03022385f2710f7f5dff380c SHA-1: 695540cb7a95a626c93408c3ea7a5c7f52d59cca SHA-256: b7112ca289c6d25366e1aca09ff8bad3eecc6596c88aa709a8e21b3adea1a13c
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/123?utm_term=volafile+boudie+call In PDF document text
    • https://cdn-cms.f-static.net/uploads/4426262/normal_5f99f1b694ce0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380211/normal_5fb3ff754a8ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368781/normal_5f9f849e513c6.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/d62f4d1d-b8be-42d9-adb7-558a1af39e4b/41932851575.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/394385d6-a83b-44af-b0ea-44d8e296aa48/nutri_ninja_pro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0ef57f8-f9de-4373-87cd-10aeffa19f4e/dog_with_a_blog_body_swap.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/poesia_de_amor_alfonsina_storni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44aa7cd6-b179-45eb-aad8-2aea4936d228/97580109438.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48826637-d1c2-4eef-acf1-9853954c96c8/49258241187.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/ginomadesobetuxodis.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/seruposipixizaboraxug.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/wikebewip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/857fbe89-794e-456b-b321-3f4be444dcb7/46866591714.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/befutiwudosogujafilitenut.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/sistema_analitico_y_pormenorizado.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/new_discoveries_in_biotechnology_2018.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E44 4848 bytes
SHA-256: 4706ac259e4736f0d8b4f72c81614394693b3391254153421865a05e74183017
font_01_sfnt_off00011edb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EDB 17660 bytes
SHA-256: a1de6498f3bafd072a47422e762cf5e8637602bec0da746518f5725d42b1d2a5
font_02_sfnt_off00015397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15397 16992 bytes
SHA-256: a49f5b900d2f45bb76b2d0918ba9eba765a18099a7925ab80deed59be841485b

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