Malicious PDF — malware analysis report

Static analysis result for SHA-256 72f46fc38d8b859a…

MALICIOUS

PDF

78.4 KB Created: 2021-01-11 01:51:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ffa3e401fc6aabab89fe4443272f8998 SHA-1: 976a9bdd4b4094dc2f9f9fa346a78cfad451059d SHA-256: 72f46fc38d8b859ae7fe38dc706ab5a4e1041b6af4400147e1e6b468ba9e630c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a large number of external links, many pointing to other PDFs, suggesting a link farm or SEO manipulation tactic. The primary URL, 'https://trafficel.ru/123?utm_term=cold+war+printable+worksheets', is presented as a lure for 'cold war printable worksheets'. While no scripts were explicitly extracted, the heuristic 'PDF_SEO_LINK_FARM' and the sheer volume of outbound links indicate a malicious intent to redirect users to potentially harmful content or phishing sites.

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://trafficel.ru/123?utm_term=cold+war+printable+worksheets PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4448550/normal_5fc3c46d8e036.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366040/normal_5f9672beb6423.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444622/normal_5fefeb7748886.pdfIn PDF document text
    • https://site-1233507.mozfiles.com/files/1233507/dragon_ball_images_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392860/normal_5fcdd1b6548d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449605/normal_5fc76412597cb.pdfIn PDF document text
    • https://site-1167993.mozfiles.com/files/1167993/growtopia_tools_free_download_ios.pdfIn PDF document text
    • https://kukibutojiw.weebly.com/uploads/1/3/0/7/130775835/250094b5a2118d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404313/normal_5f9b387536177.pdfIn PDF document text
    • https://site-1177563.mozfiles.com/files/1177563/history_of_christmas_tree_shops.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426822/normal_5ff763b235685.pdfIn PDF document text
    • https://vomerigovelaj.weebly.com/uploads/1/3/4/9/134901888/be640f5c4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456114/normal_5fedd38aaa8eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461201/normal_5fe9851067216.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383800/normal_5f90176c5fe60.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/dupula/manual_lawn_mower_malaysia.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_off0000f6a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A6 5248 bytes
SHA-256: e51eac3870dbdd93d662b14079bb9786350a60524af4e048047bd9d342eddc07
font_01_sfnt_off00010879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10879 10776 bytes
SHA-256: cd9fada3f7f5e6b5b99bc9d77ffd4a23f8931e8aa41f6768fff4c2bd42d0f6de

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