Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3fb21a515d31014…

MALICIOUS

PDF

67.9 KB Created: 2020-12-19 00:44:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 082f03f0a2060a7dddc3109fca844824 SHA-1: 4bf307b90eedd8052f116ddc1a1d8df1bbb6449d SHA-256: d3fb21a515d3101422f982c940ff50e927e7fd36fdf76229f0d04b2d10ebaa88
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. It contains numerous external links, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm or phishing attempt. The document body, though heavily obfuscated, suggests a lure related to a 'meme gif'. The presence of embedded links and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/strik?utm_term=we+got+him+meme+gif PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5fb9b99242a49.pdfIn PDF document text
    • https://puxipevabama.weebly.com/uploads/1/3/4/3/134308905/pozirar.pdfIn PDF document text
    • https://lifufamaz.weebly.com/uploads/1/3/4/6/134685481/e4a394ec5.pdfIn PDF document text
    • https://sidugavumudoriz.weebly.com/uploads/1/3/4/9/134902227/480cc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5f8811b9e0942.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384026/normal_5f8e7b4660e1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422638/normal_5fa580a700170.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498983/normal_5fb67e35e9d2c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc520d02cf09257bd86fd68/t/5fc7469e3ac9c763f4d4e515/1606895262764/puzzle_page_picture_cross_color_page_1.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10d1bea4a794d5645e011/t/5fd1676d87bef85997e10772/1607559022671/angry_flowers_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e17e23bd-5f4c-446e-aadf-2e709c458d8d/98720620363.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1642a547-15b1-41d4-9242-be175f4d21cb/64299357628.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/404409d7-403f-4e1f-bcf0-33e560e83ab2/jadogu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0fdf0cc-7525-4ec5-b8e3-888be0785e9c/89893304970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d97665a-b469-41e7-a5bc-89dc9980c3f1/kifodiviluk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a365f81f-85fc-4c17-8f7e-9ec03b0cb240/rezamafex.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_off0000d120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD120 4680 bytes
SHA-256: 5be02332180e0406bc3cc4d6fee36c91f31f5c0d8e371f69f861bf05ebc8df96
font_01_sfnt_off0000e0fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FE 9944 bytes
SHA-256: f527d9fa7fecf31af54168ebffd6945f1599a975a0e8196d6928e3ec755d29b5

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