Malicious PDF — malware analysis report

Static analysis result for SHA-256 1194f330db0f7e05…

MALICIOUS

PDF

72.0 KB Created: 2020-12-19 12:57:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89507f84269441b0dcdda15993e014fe SHA-1: d54337415e1444578b9210717edfe888bdff3882 SHA-256: 1194f330db0f7e05643da7f1aff00f96b0ab777020e1dc8986e56a712bf457ed
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 known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the presence of a link farm indicate a strong intent to direct users to malicious sites. The ML classifier and ClamAV detection further support the malicious nature of this PDF, likely used as a lure for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=louis+pasteur+middle+school+rating
    • https://wexemexaxixu.weebly.com/uploads/1/3/4/7/134709907/11ec9640ef38a.pdf
    • https://nevijajemiwawo.weebly.com/uploads/1/3/4/3/134340376/230eadea.pdf
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/nawewesujujaz_junujuvetutil_godogetenew_xerijulofo.pdf
    • https://vatozuserivowi.weebly.com/uploads/1/3/4/3/134385792/veguvagow.pdf
    • https://jinobodusere.weebly.com/uploads/1/3/4/7/134722577/2558129.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/dejazuvorira/xagininuvepabukiribupake.pdf
    • https://uploads.strikinglycdn.com/files/17812446-fb4f-46bb-92e2-75ec799724a9/rolefusimolowevuwibisuziv.pdf
    • https://static1.squarespace.com/static/5fc0e99fa13a450babf41659/t/5fc3ae2bbc819f1cf44921ef/1606659628724/stalker_call_of_misery_weapons.pdf
    • https://s3.amazonaws.com/mulerux/pazegoleruxumopigufi.pdf
    • https://s3.amazonaws.com/vavejijitatofu/e_district_revenue_report_login.pdf
    • https://s3.amazonaws.com/tokatefozude/56361068587.pdf
    • https://uploads.strikinglycdn.com/files/687e79fb-f5a5-4a1d-8822-e4231d1c6a54/57548741367.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe3494cb3e0f5771197e58/1606300821039/bovoxedaxujakuxeseg.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccae.bin
e443dd429c6b2e34f42b4459cec2cb0ad5592ea7b7f19fd8ed8e384820c0a7c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCAE 5308 bytes
font_01_sfnt_off0000de98.bin
a2d07bb26fee5b1d8bae48e3b7054babd554111e34c4eeafb9ab9bc0b907eab7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE98 11148 bytes
font_02_sfnt_off000104a1.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104A1 4324 bytes

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