Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea963add52ea06d8…

MALICIOUS

PDF

73.2 KB Created: 2021-03-24 21:03:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2443ddc8f613ba97f16891718e8ccf5d SHA-1: 9f1e9d953e0352e4f5add54f98c4e2514f890ac8 SHA-256: ea963add52ea06d85d956a561a8d84782afe415431d2930245dfa587ba99e88a
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://fokemale.ru/award?keyword=mathematics+for+economics+and+finance+pdf+download PDF link annotation
    • https://kevonixoxudunu.weebly.com/uploads/1/3/0/7/130775897/miwamulimifabajosoj.pdfIn PDF document text
    • https://jiwosanoxonu.weebly.com/uploads/1/3/5/2/135299962/vesigokon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403807/normal_6014bbe74d06e.pdfIn PDF document text
    • https://zezupivipikoko.weebly.com/uploads/1/3/4/5/134596705/47924050d44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367013/normal_5fe955b975659.pdfIn PDF document text
    • https://nidegezepon.weebly.com/uploads/1/3/4/6/134650885/bakiboveguz-bavasamalovo-rizulupuv-lekelanamomala.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455198/normal_5fc666c44a068.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472783/normal_604f2e0eb5047.pdfIn PDF document text
    • https://zabagogaj.weebly.com/uploads/1/3/5/3/135313674/4ec900.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421637/normal_605ae6f55615c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453142/normal_604a8f426e831.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/genedonapubefe/pibepezazuru.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/58616808154.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/955648624.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/lazowisixigoxat.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/how_to_find_the_magnetic_flux_of_a_solenoid.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/texas_sheet_cake_recipe_vanilla.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/61985521744.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/horus_heresy_book_3_extermination_vk.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/79878201965.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_off0000e061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE061 5492 bytes
SHA-256: 08606e9546bf92125b3bc90c582a83505d706a5b6f5e654d92d52b1647f3d7d2
font_01_sfnt_off0000f306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF306 10772 bytes
SHA-256: 77afd14840e3391700936f0b5b9d437608d0d515f588ed570d8399af89016524

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