Malicious PDF — malware analysis report

Static analysis result for SHA-256 88539d9d16945d4d…

MALICIOUS

PDF

74.1 KB Created: 2021-01-10 21:44:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4ce1c8c41710bda660729cb7a1801497 SHA-1: 7dff2403ab1dd9c70701b912646f8e16244f6550 SHA-256: 88539d9d16945d4d76d98e9ad71ab0122f47b37c8e29ecc8a9b1194be85fa0a8
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least two identified as malicious redirectors. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly indicate a campaign to drive traffic to potentially harmful sites. The ML classifier and ClamAV detection further support the malicious nature of this document, likely serving as a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=weak+men+create+hard+times In PDF document text
    • https://site-1178668.mozfiles.com/files/1178668/86536353014.pdfIn PDF document text
    • https://site-1178814.mozfiles.com/files/1178814/love_your_husband_scripture.pdfIn PDF document text
    • https://site-1177496.mozfiles.com/files/1177496/grey_fox_4k_wallpaper.pdfIn PDF document text
    • https://site-1180062.mozfiles.com/files/1180062/tajawogotifanivebaxeveza.pdfIn PDF document text
    • https://xoropugu.weebly.com/uploads/1/3/4/7/134707238/norozowaba-tomiteka-kamogezeguvadis-retenapomapivil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f93a039ccfbd.pdfIn PDF document text
    • https://site-1177364.mozfiles.com/files/1177364/24929274626.pdfIn PDF document text
    • https://gizutiki.weebly.com/uploads/1/3/4/4/134478998/dotagaru.pdfIn PDF document text
    • https://lifalaril.weebly.com/uploads/1/3/4/8/134883644/guzijorefi.pdfIn PDF document text
    • https://site-1241850.mozfiles.com/files/1241850/3d_car_driving_games_online_play_for_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zetituri/letchworth_garden_city_heritage_foundation_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/53755374473.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/rasoseguzanafeduka.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/bacterial_identification_lab_worksheet_key.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_off0000e4e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E3 5224 bytes
SHA-256: 105616be33fc28e9f39e4403fec89a2428b52c4f3a2cfb171ea2ca401782a3e1
font_01_sfnt_off0000f68d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68D 10900 bytes
SHA-256: 21edb46e328b80eacdbe5ef4deadae6dc41107b1ebc9df1e251bfc24e8df8314

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