Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e2f82a1782d0b4a…

MALICIOUS

PDF

68.6 KB Created: 2021-02-16 20:08:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ecb1f37c479096ec21e4397f34c348e7 SHA-1: c4db36d9b150d6fafc8d313be37efe8a89ec200a SHA-256: 4e2f82a1782d0b4a419d692cba4ba3040df2795eec1c6c763d2b9e597a7066ed
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9696

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://baarspo.ru/strik?utm_term=rimas+y+leyendas+gustavo+adolfo+becquer+genero+literario PDF link annotation
    • http://rankingcoach-seo.com/13306621161aieav.pdfIn PDF document text
    • https://nodokesomizi.weebly.com/uploads/1/3/4/6/134656280/3212946.pdfIn PDF document text
    • http://itdomen.fun/hautbois_guide_shoplbduy.pdfIn PDF document text
    • https://lomewulepizava.weebly.com/uploads/1/3/3/9/133999744/luxapotajuwekikot.pdfIn PDF document text
    • https://mepopukivar.weebly.com/uploads/1/3/6/0/136083549/5942755.pdfIn PDF document text
    • http://goodsun.space/gems_of_war_ascension_guide7m6lx.pdfIn PDF document text
    • https://xaxazusilu.weebly.com/uploads/1/3/4/7/134757455/89a380c2834e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426267/normal_5fe275b962995.pdfIn PDF document text
    • http://betflixguvenilirmi.com/new_international_business_english_student_s_book_free_download75lbm.pdfIn PDF document text
    • https://tunoritusaw.weebly.com/uploads/1/3/5/3/135328070/cc97b0d13.pdfIn PDF document text
    • https://giwemonuxir.weebly.com/uploads/1/3/0/7/130775654/nevote.pdfIn PDF document text
    • https://xunilizavokuniz.weebly.com/uploads/1/3/6/0/136050149/4641202.pdfIn PDF document text
    • http://birjand.design/indonesia_vpn_for_android_apk8i2q5.pdfIn PDF document text
    • http://opit.space/81127426418xmnmt.pdfIn PDF document text
    • http://naturalik.fun/biodanza_rolando_torobbe0j.pdfIn PDF document text
    • https://vaxejoxumede.weebly.com/uploads/1/3/5/3/135346770/kinobus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d7c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C8 5776 bytes
SHA-256: 4528913f08cc0b88dad2e224ae4f4a8eea0d49d9f7a384a1e062ac2156332460
font_01_sfnt_off0000eb6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6C 11336 bytes
SHA-256: 2e9bb4a7baab653ee491c8d84c019c50b4cd6ff2260e43bd3446138bdc24ced8

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