Malicious PDF — malware analysis report

Static analysis result for SHA-256 a94391c4b32d5ac3…

MALICIOUS

PDF

74.7 KB Created: 2020-11-11 04:40:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 51e0178ab080894f1774a81a8e881cfb SHA-1: 84bb3286ef6c63515fb64d8329b33ffb9c3ff2bd SHA-256: a94391c4b32d5ac391f53958234c9ddd7bcc41d0b2c931477a97d01080be2d9d
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to phish or deliver malware. The ML classifier and ClamAV detection strongly support maliciousness. Although no scripts were extracted, the embedded URL and the nature of the PDF content suggest it's designed to trick users into clicking a malicious link, likely leading to a phishing page or a second-stage payload download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://traffmen.ru/123?keyword=dewalt+dc720+manual In PDF document text
    • https://boxavukexuzar.weebly.com/uploads/1/3/0/7/130775797/1522019.pdfIn PDF document text
    • https://tiposowa.weebly.com/uploads/1/3/1/1/131164246/xudokakisiwediziju.pdfIn PDF document text
    • https://fosogaji.weebly.com/uploads/1/3/1/4/131455903/kawoxizewokebifaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368991/normal_5f8d52ab0c6c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374698/normal_5f97eb697ceaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376371/normal_5f95b2205a2ff.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/f4247d97-2775-400c-a97a-93b9331e8db5/pidore.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/dieta_cetogenica_cardapio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/128e2a39-28e8-4633-8c56-a76c11d80e35/wajaredopinoto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d375aac-b369-4c2c-9108-af51b6363549/dowepitepebabavalisumujaz.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/jekokuxisuriko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96e90835-1d91-4da2-a18a-59803887fea5/81593389420.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b621287f-7da2-4dab-b67c-9e76d82258e1/fozipidigisurinidi.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_off0000e53f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53F 5256 bytes
SHA-256: d389e059db48a6d70c2924edc215f75f0c2074504a279f77e5ef922344d803c0
font_01_sfnt_off0000f733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF733 11512 bytes
SHA-256: c2143b5f7d04a598ee968e675a9e7eafdd67436cd08ae667dd9afad407c920ce