Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dea618db294300f…

MALICIOUS

PDF

103.6 KB Created: 2020-12-21 06:02:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: b8393d39deb9fe2ec60a36cb29b9d33c SHA-1: 5e38970a2dee283cdecd7d76d667a65c99f29c52 SHA-256: 1dea618db294300fa4c58db4014a45d2eeb402d053c15878702c7befa067bd76
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier and ClamAV also flagged this file as malicious, indicating a high likelihood of phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure itself facilitates the redirection, likely to a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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://traffking.ru/strik?utm_term=ark+wyvern+command+id In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375522/normal_5fd7e34a753a3.pdfIn PDF document text
    • https://murarukaxew.weebly.com/uploads/1/3/4/6/134666391/9564389.pdfIn PDF document text
    • https://revarepafe.weebly.com/uploads/1/3/3/9/133997647/eabc62e99c58a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488133/normal_5fcc606885794.pdfIn PDF document text
    • https://gokisixoxi.weebly.com/uploads/1/3/4/1/134108612/15cbd0c54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495994/normal_5fadd72ea5c80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390092/normal_5f952d6800fe6.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://s3.amazonaws.com/faluzotixupi/79031871982.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/bluedio_ufo_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/76439067656.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/vinyl_sheet_flooring_in_bathroom.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000136de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136DE 4892 bytes
SHA-256: bfda078e7f85d1925e902cb9fd84bd6c1289e6235b25769c2c52ee9895f6539b
font_01_sfnt_off00014766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14766 11328 bytes
SHA-256: 1a8c8d734e0f52c47f64a7617325c632892b12d017c29ca06a1e6e8c478e8692
font_02_sfnt_off00016dbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DBC 16192 bytes
SHA-256: 4682b72f2afa33b20cf875d84024ffdd6778cb348d5560ed491e7fe37e149525
font_03_sfnt_off000182ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x182CA 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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