Malicious PDF — malware analysis report

Static analysis result for SHA-256 edbea370527a817b…

MALICIOUS

PDF

69.0 KB Created: 2021-02-11 03:19:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f446435b5bc5a93611bf9cbbcce4ecfe SHA-1: 1da0532f05607c662ef174b8df1c28298a908059 SHA-256: edbea370527a817bbf8231d7634e19fade8914f848d757eed6ccd55ebe20f70b
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 0.9998

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://druttle.ru/123?utm_term=super+smash+bros+unblocked PDF link annotation
    • https://wonumajogo.weebly.com/uploads/1/3/1/3/131379434/matofajugawumizufize.pdfIn PDF document text
    • https://pelimabogex.weebly.com/uploads/1/3/4/6/134685965/7171112.pdfIn PDF document text
    • https://norofuzalugegok.weebly.com/uploads/1/3/4/8/134882219/nagikeb.pdfIn PDF document text
    • http://blacktea.space/highway_bike_simulatorjt5l6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445337/normal_5fd65a439081a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418987/normal_601f63e3b72b3.pdfIn PDF document text
    • https://nibowivuxewanu.weebly.com/uploads/1/3/1/3/131379040/69535fbe.pdfIn PDF document text
    • https://lamamamim.weebly.com/uploads/1/3/1/6/131606140/jalogopofade.pdfIn PDF document text
    • https://wabezapodila.weebly.com/uploads/1/3/1/4/131437306/bikag.pdfIn PDF document text
    • https://jafedemigizol.weebly.com/uploads/1/3/4/5/134588438/ff548748.pdfIn PDF document text
    • https://virenejamavik.weebly.com/uploads/1/3/4/1/134131854/25df72085d.pdfIn PDF document text
    • https://lewovabarififu.weebly.com/uploads/1/3/1/4/131453312/suzojinewok.pdfIn PDF document text
    • https://rikizanasurixa.weebly.com/uploads/1/3/1/3/131379420/zevolus-texiv.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/tuxutedi/27617518039.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/besixixob.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/gta_5_crack_steam_api64._dll.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/wogifumepopepeborisafij.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_off0000cf90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF90 5620 bytes
SHA-256: 462efd4cb04fbb7d7c22cae9806c7c9b40361c399fc8809c9e4846da5435283b
font_01_sfnt_off0000e276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE276 10772 bytes
SHA-256: 385cc250dc2cb4c68d16654df50f183cd13fa8b4c636bb36c078777606c11d43

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