Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccfe6698ecc49f25…

MALICIOUS

PDF

72.0 KB Created: 2021-02-27 17:04:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9462ff352e7091da2e43b52c158296fa SHA-1: 186a2b10e0da910638a83376a411ed2d497760da SHA-256: ccfe6698ecc49f25737c436c644920bc90387ad6409073f3113f57933e51fc74
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting it is part of a link farm or phishing operation. The embedded URL `https://soxebez.ru/strik?utm_term=who+invented+electric+bulb+first` further supports this, as it directs to a suspicious domain. While no scripts were explicitly extracted, 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://soxebez.ru/strik?utm_term=who+invented+electric+bulb+first PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415051/normal_6015d7372bf74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502833/normal_5fc97817eaf57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375344/normal_601b429d82456.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379855/normal_5ff45495df080.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530910/normal_5fe514ea4d94a.pdfIn PDF document text
    • https://bakuzasopawej.weebly.com/uploads/1/3/1/4/131408369/2182973.pdfIn PDF document text
    • https://cdn.sqhk.co/wadupaxi/jKhi47d/fegezud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527345/normal_5fee7e80914ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448724/normal_6010b6ede46a8.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/ghtZFhc/very_long_natural_nails_youtube.pdfIn PDF document text
    • https://vutakajar.weebly.com/uploads/1/3/4/8/134896426/85c51fec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486971/normal_6034d29eaae47.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/tojabixefova/chick_fil_a_kale_salad_nutrition_information.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/83521590940.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/64041134525.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/mercruiser_5.7_service_manual.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF18 5112 bytes
SHA-256: 53fc9698c99464796de7c3462e24259e468e970c886cccb9f7aaf77123d0ef5e
font_01_sfnt_off0000f08a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08A 10096 bytes
SHA-256: facf9a24fd0cf881efc304b15d73e4eb46ecdb29840fa0b1be663006c469c333

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