Malicious PDF — malware analysis report

Static analysis result for SHA-256 4185a4584e4a5c48…

MALICIOUS

PDF

74.1 KB Created: 2021-05-21 12:43:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: fe77aa4191c7baa84e8f2a8929631995 SHA-1: 12a3c1d66fc96ef375a30f3c358abfd6f007375a SHA-256: 4185a4584e4a5c482f3ca606433c5eec41483027ed7a53b376904f9bee96d372
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 a large number of external links, identified as a link farm, with the primary URL being https://nipisod.ru/strik?utm_term=bollywood+actresses+in+saree+pictures. This suggests a phishing or content-scraping attack. 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-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://nipisod.ru/strik?utm_term=bollywood+actresses+in+saree+pictures PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4457582/normal_5fd67c7fe7006.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386606/normal_6033d849efaf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369771/normal_6066cd26922c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487419/normal_604edfe3e37aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447878/normal_605b8dc3cae72.pdfIn PDF document text
    • https://volilisaxox.weebly.com/uploads/1/3/1/4/131453747/32b9fde9d0f647.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445321/normal_60418bcd3892c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469623/normal_6022c5c236b48.pdfIn PDF document text
    • https://lekifusa.weebly.com/uploads/1/3/1/3/131382118/3423135.pdfIn PDF document text
    • https://rarerosedipise.weebly.com/uploads/1/3/4/8/134876587/b32530f24c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411691/normal_6031b2317dc0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367938/normal_5ffd9f1a36b2c.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/kezemiradigu/the_choice_chapter_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f076bbec-9e3e-40d5-96f6-447db4fc0176/fomaradikepizese.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/etudes_en_france_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d36fd38-2623-4e7b-9d1c-e165e641bd8a/vuwilofosakirumolibunidid.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/maregujugima.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/56699919872.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/24559063512.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/kepedixos.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_off0000e620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE620 5308 bytes
SHA-256: 3a0fdb7e92c6e4ecc56d349131015113d394a57de724fd25cca9ee1fc1b413cb
font_01_sfnt_off0000f859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF859 10284 bytes
SHA-256: 326c588f7894e68128b5af9d36e009ccbf4e613c94b192824233d0a99fd307ea

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