Malicious PDF — malware analysis report

Static analysis result for SHA-256 b056a6e07ac6b251…

MALICIOUS

PDF

93.4 KB Created: 2020-11-27 02:30:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 3e163338f141a7cb6fec39a91a909abe SHA-1: debb62de91436d99dce817bb5eee88f1c4bbef7e SHA-256: b056a6e07ac6b251fe1efbf3b9c006fdf0f2fa8683eacb6e9cb0911d3cc463df
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://cctraff.ru/strik?utm_term=sustentar+sobre+psicomitricidad In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393625/normal_5f922be59b674.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369309/normal_5f89f1680b975.pdfIn PDF document text
    • https://xulejodamujodu.weebly.com/uploads/1/3/4/7/134771271/3079849.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407784/normal_5f9975c65c756.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385004/normal_5f8f6ac50ae82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380525/normal_5fb62921e77fe.pdfIn PDF document text
    • https://duxawedi.weebly.com/uploads/1/3/4/4/134477895/wotuvibopas_kebugetipas_jowunevaxafu_dozejaduwib.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/mubemutolewe/bluetooth_earphones_for_android_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/lewis_dot_structure_practice_problems_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/kizamefuromukakumepibew.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off00011ad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD3 6744 bytes
SHA-256: b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
font_01_sfnt_off00012bb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB8 5432 bytes
SHA-256: 5649e7d74c74edcbe367c4dcf8b72e5470b0625f43dff4b43e19c2b687096995
font_02_sfnt_off00013e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E0F 12760 bytes
SHA-256: 35fc280883a400837cfae35333154f34ccc20f69f2bd52c49136b10c4ad98694

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