Malicious PDF — malware analysis report

Static analysis result for SHA-256 552cc0f6d6916f26…

MALICIOUS

PDF

67.8 KB Created: 2020-11-18 12:25:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 75e096073123a21d419c814f8678e413 SHA-1: 2e14c36cab1097265b9a43a9e03883343ed574e6 SHA-256: 552cc0f6d6916f26f9eaefbdeacc99d19458b3014d6f8c6e3de82b4d461c896c
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/123?utm_term=united+states+clipart+map PDF link annotation
    • https://disanelazutiwi.weebly.com/uploads/1/3/4/3/134361230/temuvet.pdfIn PDF document text
    • https://namoxatiki.weebly.com/uploads/1/3/4/4/134477177/winubemexovov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408873/normal_5f9a83bcb5ae2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380223/normal_5f8cbbda3d501.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370555/normal_5f919e043e893.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/vuraradaso/pesquisa_de_mercado_qualitativa_e_quantitativa.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/widifopukiv.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/kekifowikexipusoji.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/hot_air_greenhouse_heating_system.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/97415049201.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3c929c8-3eab-4626-b034-28879bd6ff9f/77262320211.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/cardiotonic_glycosides.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/11037471716.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_off0000cecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCECB 5212 bytes
SHA-256: ad4b5edd9bb2a6e34c8b78d953319fde2b9cf2d3f9d0b262fcfbf74a9135d911
font_01_sfnt_off0000e071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE071 10184 bytes
SHA-256: 4d06d8e2a6ccfa8db2dc768c84543d0bac377e58f33c8cae14010cd0c02dcf52

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