Malicious PDF — malware analysis report

Static analysis result for SHA-256 a78e2a6b954a5650…

MALICIOUS

PDF

49.1 KB Created: 2020-11-02 10:25:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b56b0f007a91968e05d9b6483cb37261 SHA-1: 81f46af1f2367d18f17e11b2a2459d9183196bf6 SHA-256: a78e2a6b954a56507e026dd9f544474b2aa3d7ffa25b1a7c762903357b66bd27
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a link to a known malicious redirector infrastructure, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains the URL that is likely intended to trick the user into clicking it. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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://ggtraff.ru/strik?keyword=gel+electrophoresis+lab+report+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374708/normal_5f931232987c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374189/normal_5f8c0e6185d5c.pdfIn PDF document text
    • https://fobolobal.weebly.com/uploads/1/3/4/3/134317950/b9776.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374840/normal_5f907b7e179cc.pdfIn PDF document text
    • https://dajemegexiri.weebly.com/uploads/1/3/4/4/134492390/lopevurujesozamoloko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382779/normal_5f8d7db556c08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388279/normal_5f908e78431a2.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://cdn.shopify.com/s/files/1/0502/2144/9374/files/rumunamajuxajilopo.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/gejujituxivogijasala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0302/5840/files/picsart_pro_gold_apk_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7175 5072 bytes
SHA-256: 39671a765dacc216f0f45667fc13055613d15244905ef4908ca6773015090046
font_01_sfnt_off000082ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82AC 11384 bytes
SHA-256: aa646c078d1ac52cbca827e857c41e16f254768d37c413cf5bffd584fc189345
font_02_sfnt_off0000a92c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA92C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378