Malicious PDF — malware analysis report

Static analysis result for SHA-256 bab8279c979f8c52…

MALICIOUS

PDF

68.5 KB Created: 2021-01-16 04:08:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 59f3bbe4fb6a95846fe3908b3da7be53 SHA-1: b84f93342103525ca725ec6b7563b9def8b68f1d SHA-256: bab8279c979f8c52eec2051387b57485874a1d4d6dd9f4fc2696c25141aa6028
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of external links, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of numerous external URIs and the PDF_SEO_LINK_FARM heuristic confirm the document's purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffset.ru/123?utm_term=tim+cannon+tiktok PDF link annotation
    • https://site-1173632.mozfiles.com/files/1173632/warframe_crossplay_switch_ps4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489033/normal_5fef5cd02c200.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407299/normal_5fcd8dc71542e.pdfIn PDF document text
    • https://retizobokeli.weebly.com/uploads/1/3/1/0/131070240/b006d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413712/normal_5fd8f4f054086.pdfIn PDF document text
    • https://birijoxumel.weebly.com/uploads/1/3/4/5/134587798/7302039.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426960/normal_5f9c651c4b194.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5fe9348b4440e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369629/normal_5fbb84a44c98a.pdfIn PDF document text
    • https://site-1176460.mozfiles.com/files/1176460/foxusaxavifotarurera.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365562/normal_5f9fcdea21ff3.pdfIn PDF document text
    • https://xarudaxukisa.weebly.com/uploads/1/3/4/0/134018653/1486689c9a258c.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/lupuvogotog/21044196064.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_off0000d031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD031 4652 bytes
SHA-256: 323d31f8f0e9c64f5c93283971a00ca55a3203b1b89101559fc2a72ee81e0656
font_01_sfnt_off0000dff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF7 10940 bytes
SHA-256: 5734131020421bdf1241681672e936181ca670b7c0ab0ae48dd297bf8939375d

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