Malicious PDF — malware analysis report

Static analysis result for SHA-256 329a1a298071cc6e…

MALICIOUS

PDF

70.4 KB Created: 2020-11-19 04:37:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b17174289f0a7e25684d3f153088d80f SHA-1: 6c3ba552d26b9d9e02a1416e1170251d04201a5f SHA-256: 329a1a298071cc6ee2b7b87b02e9c8c044c9ec618a887bf1679374135be177d0
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly indicate a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to Photoshop settings, suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/strik?utm_term=appliquer+r%2525C3%2525A9glage+sur+un+seul+calque+photoshop In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374199/normal_5f92618987354.pdfIn PDF document text
    • https://gigufeti.weebly.com/uploads/1/3/4/6/134633464/c2fbcaa94d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387699/normal_5fae95fb6ced9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426073/normal_5fa41d7419b47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378852/normal_5f93cf63587cc.pdfIn PDF document text
    • https://bekijarodik.weebly.com/uploads/1/3/4/6/134617997/pasepavixufevowatose.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407057/normal_5f925d0d7020b.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/076f24d4-128f-40e2-bc5b-ce9ec69614f4/kidumupesupegixowofivogos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65e4e8b2-2138-46b5-8bc4-194aa7a5fdf6/fifty_shades_darker_free_download_ebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d69e6b6f-f03e-46b6-af5e-4def27a23add/virtual_girl_full.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dd84cd5-cb3a-401c-99cd-a3ad0ea4f5b1/bunenerubajuraxekugenigez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dddc2159-9fe4-4e7d-97fc-26d9172c0607/popelazopuwuwesimo.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/99507525570.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/sage_valley_middle_school_gillette_wy.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_off0000d2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FB 5452 bytes
SHA-256: 1f4f48e87a9368d65d1ac6dbb4fecc6f7e1896152b74671528bf3e0d97123d97
font_01_sfnt_off0000e536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE536 12040 bytes
SHA-256: d9b0c5a7d24e0f5db1f0d1e514b8669b26f9f41ec6b90ba6554cb7b00b6cfcd9

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