Malicious PDF — malware analysis report

Static analysis result for SHA-256 04505018adb81080…

MALICIOUS

PDF

103.5 KB Created: 2020-12-18 21:55:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b602fbf443f372ba401fc2e937351da0 SHA-1: 1ace00bb9f0360ac80a643cbc8ae771af267c56e SHA-256: 04505018adb81080d06086d9b320d76f2b3395e62f0b7ade900ab3e01916d40d
214 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create documents for SEO link farms. The presence of numerous external links, including one to a known malicious redirector, strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffmen.ru/123?utm_term=rhythm+and+blues+history+timeline In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368759/normal_5f9440d4c5dbc.pdfIn PDF document text
    • https://pomitowu.weebly.com/uploads/1/3/4/3/134389192/dogiwagak_rajewo_mafoxapulewo.pdfIn PDF document text
    • https://javevopikaze.weebly.com/uploads/1/3/4/4/134489205/mumeganamugikovolevo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451375/normal_5fd0555d7efd0.pdfIn PDF document text
    • https://loruwudo.weebly.com/uploads/1/3/4/7/134738316/be122225b0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384463/normal_5f9b0034b49fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470221/normal_5fc2a079f3f44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444369/normal_5fbf87f64fd28.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/fd0b1267-3633-4abd-8fff-2d0afebb4074/motor_speedway_of_the_south_ebay.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/47541721634.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9e2a541-9c19-475c-82a9-bffeb870ca14/ejemplo_de_una_secuencia_didactica_para_secundaria.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014a0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A0C 5196 bytes
SHA-256: 6ac3bb52519d6050bf8ca194285227951cf9422908a529d7453ddbb2d74d3638
font_01_sfnt_off00015b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B89 11764 bytes
SHA-256: 46c9b08cbe120a252477d9e0ed78083ed56664ee9b214a5b7e0617aca5c3bce2
font_02_sfnt_off0001829b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1829B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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