Malicious PDF — malware analysis report

Static analysis result for SHA-256 048b72403f6590ca…

MALICIOUS

PDF

73.7 KB Created: 2021-01-02 02:16:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: bd21001496e9f4737886bcdc61162235 SHA-1: 9765b84e47378623a8b96e97d05220af2bb4a839 SHA-256: 048b72403f6590caceeb4ce3507291e208e533361393f99dbdcd3f6845640a8a
214 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 and 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 0.9998

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
  • 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.
  • 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.
  • 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=modern+environmental+science+and+engineering In PDF document text
    • https://static.s123-cdn-static.com/uploads/4452587/normal_5fdd6ebceb9dc.pdfIn PDF document text
    • https://mujiborabasovu.weebly.com/uploads/1/3/4/5/134590634/6627286.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480145/normal_5fa939308a334.pdfIn PDF document text
    • https://litepuvib.weebly.com/uploads/1/3/4/7/134741427/5781592.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463810/normal_5fd858b99b5c7.pdfIn PDF document text
    • https://lizatupapej.weebly.com/uploads/1/3/4/4/134401074/walofatavetupati.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/cfa2b814-335a-48d4-bab3-0536df869121/37977584435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aee19333-2625-45a3-91ce-643b68cb9bbb/schoology_quiz_answers_hack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d0b5d3a-7c51-4635-a4e3-f0ef4fa7fc62/1842921351.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9333bf3-bd58-442e-9941-55d7da34bbb6/bolafojuvovufuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25e13187-c66e-4630-8a84-88dedca29f05/sisigebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a179e8a5-b762-4373-9e31-1db2c3a97abc/mini_ninjas_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c351979-2fb6-498e-8edb-7562c3e1339a/16631296516.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef2d8a2b-b707-4857-bd0f-78a1ad7f73c7/stephen_hawking_libros_gratis.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_off0000e298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE298 5324 bytes
SHA-256: 619e630420da604cef403f6b91c3666b6738f912cb281cabcd0594a658b74830
font_01_sfnt_off0000f4ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AB 10944 bytes
SHA-256: e5d3355f09251a7db1274e4501cf23d0957ca187d47a9cfe4accf24f4d0ae46e

Open this report in the interactive analyzer, or submit your own file for analysis.