Malicious PDF — malware analysis report

Static analysis result for SHA-256 16b78e9320122825…

MALICIOUS

PDF

43.7 KB Created: 2020-10-29 22:50:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ce711129ad24a95cd58399cc48d91b1c SHA-1: b7d73bafdfa28b1261c7f3e8fe3619e98a465897 SHA-256: 16b78e9320122825445023b73dd0b2f0835ea13853abf43a535b0d4e08bad520
94 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious URL, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded link suggest a phishing or redirection attack.

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/aws?keyword=toshiba+vhs+dvd+recorder+manual In PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/ganepon-fadogi-nerere-dusij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374976/normal_5f8d2cc86e5e1.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/dixaleko/sim_not_provisioned_mm2_att.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4743/4440/files/poco_f1_android_10_stable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/074bc406-9783-449c-867b-5947b92efc1f/76883323366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f26bf50-9b7d-4f1b-8b41-00bf190123c5/dugalapazapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88e8ff25-dc9d-488a-9063-71749aea0469/nizosekudowe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bf04624-2269-458e-acf0-dc4e8b4837b7/disgaea_2_walkthrough.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/mozomoxenid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4470ff7-3114-46ba-b1ee-dfaa7232e4f7/53773859569.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/xiduwirigibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d706dc2-03ab-4668-b2af-187db4ec0316/fawipovebatofikerexep.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_off00006ce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE7 5328 bytes
SHA-256: 6c94a7f5f80de23673bc3c2c19d3853a48db6bd0adb9d778a73ee2e6b2af9af9
font_01_sfnt_off00007edd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EDD 10224 bytes
SHA-256: 677bc77f784b9c9e13dbbb83d72be209f4575b0f26de3e79206b1e7833069eec