Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4feeddc4d4dbc00…

MALICIOUS

PDF

72.3 KB Created: 2020-12-21 04:19:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 6da9c73a34efa9bc0a4075055d1ac64e SHA-1: bde978ae5fc8e3209cc37f88851846fb8cca98cb SHA-256: f4feeddc4d4dbc00de7bc95890b515eaf5c8acf0fb34a7b93548e0e44f679ff4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, directing users to various PDF files hosted on platforms like Weebly and f-static.net. The primary URL, https://traffking.ru/strik, suggests a traffic redirection or malicious campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://traffking.ru/strik?utm_term=loop+recorder+placement+icd+10 PDF link annotation
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/ed9f7df9972d06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420903/normal_5fa15dafc9bc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408323/normal_5fb832009d12f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405925/normal_5f99dfc27e616.pdfIn PDF document text
    • https://jaweditulopo.weebly.com/uploads/1/3/4/3/134313576/linutopenit_ragizibodapofuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388833/normal_5f98f2cfeab55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380405/normal_5fa3f2c29ac14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413008/normal_5fb34aa784dc2.pdfIn PDF document text
    • https://welavomuwaj.weebly.com/uploads/1/3/4/6/134633166/fopezuradeniken.pdfIn PDF document text
    • https://zinixukugezevul.weebly.com/uploads/1/3/4/6/134612333/4e4f7f0a1284860.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477615/normal_5fbf2fd03d8f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370560/normal_5f90613ce8295.pdfIn PDF document text
    • https://fivilogavizizov.weebly.com/uploads/1/3/4/4/134446089/mibumuzo.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
    • 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_off0000d0db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DB 4964 bytes
SHA-256: f5ed471591d1418bc7a56cb02df4ada6d89ae0b6efec02d11b6ae1380151c212
font_01_sfnt_off0000e197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE197 10996 bytes
SHA-256: 4e7ce430c7a2cb6f4bb92887373a77cacde9bf0aae1cac0397e9dfabe970ed2b
font_02_sfnt_off00010635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10635 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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