Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb49af8208eb2c7f…

MALICIOUS

PDF

76.8 KB Created: 2021-03-23 10:10:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 368e59761bb571bd99fadf8be5c7677c SHA-1: cc458ff454ec30806083bfda5dd250aacf8d3453 SHA-256: bb49af8208eb2c7fab7de97084b6da07e85c1fee400da625462f7789ebc8a323
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to a download link. The ClamAV detection and ML classifier strongly suggest malicious intent. The primary IOC is the redirector URL, which is likely used to serve a second-stage payload or lead to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://zajinet.ru/strik?utm_term=the+book+of+secrets+loreena+mckennitt+download+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4456376/normal_5fe603b8e8fab.pdfIn PDF document text
    • http://talakam.space/autocad_revit_2019_serial_number_and_product_key_crackowd94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479675/normal_5fcce172846b0.pdfIn PDF document text
    • http://ritual-venki.online/mercury_9.9_2_stroke_outboard_for_saled3gcj.pdfIn PDF document text
    • https://xateboduf.weebly.com/uploads/1/3/1/4/131483383/wezowof-zakabuwe-bidiwelitixof-popik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452861/normal_5ff59d5080dd9.pdfIn PDF document text
    • http://folovavizenemi.22web.org/69894813261.pdfIn PDF document text
    • https://toginomaba.weebly.com/uploads/1/3/4/0/134042469/tanefinoz.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/D9q5Sje/63438417252.pdfIn PDF document text
    • https://cdn.sqhk.co/mapexovebo/ja2ebcb/tifar.pdfIn PDF document text
    • https://cdn.sqhk.co/sevigexew/hgagdjj/marlboro_ice_blast_usa_price.pdfIn PDF document text
    • https://wakowugiluto.weebly.com/uploads/1/3/5/4/135401031/71e414759.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449775/normal_60500f5abace4.pdfIn PDF document text
    • https://cdn.sqhk.co/ratufewebu/bFHNjh1/kewugefesolefesoz.pdfIn PDF document text
    • https://cdn.sqhk.co/pesamelez/jMmmfpV/37438986092.pdfIn PDF document text
    • https://jubaluwaruzazux.weebly.com/uploads/1/3/2/7/132740890/1374047.pdfIn PDF document text
    • https://jetezilim.weebly.com/uploads/1/3/0/7/130775858/ad33c15ddf33d50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453754/normal_5fc8de2f32c6b.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/pomaxa/14812006380.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/mozilla_firefox_browser_version_51._0._1.pdfIn PDF document text
    • http://xiwaresijo.epizy.com/formation_chaudronnier_soudeur_pau.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/alight_motion_pro_apk_without_watermark.pdfIn PDF document text
    • http://nawopezor.rf.gd/5_minute_guided_meditation_music.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_off0000ebea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEA 5508 bytes
SHA-256: bcd8dbb470541dc8912d85c32df7ee682b1bd4e1f2a3a5719024d8bec37eff25
font_01_sfnt_off0000fe8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8D 11988 bytes
SHA-256: c0f34451a49083bea135cffbf11a4eadd05822e047c0e591d65a37ac96d8f742

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