Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cb685f45fe662b1…

MALICIOUS

PDF

85.0 KB Created: 2021-03-22 06:41:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ce13ecc30047cd82e5940d9f4c76bc7a SHA-1: b08a76ecabceb8b4f83bc6e379da8afacbb5dbcd SHA-256: 6cb685f45fe662b144c88d35d7059b679fc0159a37ee1cbff6dc499c22d51198
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains and employing UTM parameters, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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
  • 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://lozipotod.ru/123?utm_term=ios+for+iphone+6+a1586 PDF link annotation
    • http://kulotufiw.mypressonline.com/bazovosesujakapiloxebi.pdfIn PDF document text
    • http://betmoy57.com/201543449968eufv.pdfIn PDF document text
    • https://kexexetipo.weebly.com/uploads/1/3/4/8/134897314/zisijadaxulopep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475859/normal_601ba7d2b3771.pdfIn PDF document text
    • http://tenumuxuw.iblogger.org/craftsman_125_psi_1_hp_7_gallon_air_compressor_manual.pdfIn PDF document text
    • http://good-production18.site/157927866125w5v1.pdfIn PDF document text
    • http://dudoxanudito.scienceontheweb.net/70362712623.pdfIn PDF document text
    • https://fusajowaxoxa.weebly.com/uploads/1/3/5/3/135344195/59aa0f32da9d4.pdfIn PDF document text
    • https://rogebanapixiwo.weebly.com/uploads/1/3/5/3/135343373/2045085.pdfIn PDF document text
    • http://vatidenow.medianewsonline.com/10643378321.pdfIn PDF document text
    • http://antonioit.space/vujedotipawofojetogurv99qv.pdfIn PDF document text
    • http://lirinevewafa.mypressonline.com/dosozigasilarivonatumu.pdfIn PDF document text
    • https://pofekabebo.weebly.com/uploads/1/3/0/7/130739116/9acd09b8.pdfIn PDF document text
    • https://jipowikufimur.weebly.com/uploads/1/3/5/3/135327107/kexegu-gidowomatovuxu.pdfIn PDF document text
    • https://kijomexed.weebly.com/uploads/1/3/1/0/131069838/7d78c433.pdfIn PDF document text
    • http://peluxuba.sportsontheweb.net/you_always_interrupt_me_quizlet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407064/normal_6008317154c96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373240/normal_60199f38062f4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vixugow.epizy.com/android_tv_remote_control_app_ios.pdfIn PDF document text
    • http://nugonufife.rf.gd/47805604916.pdfIn PDF document text
    • http://lepuxateg.epizy.com/lusasimorineferetamufubo.pdfIn PDF document text
    • http://bubalafugevale.rf.gd/76481660369.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_off00010d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3A 5420 bytes
SHA-256: 61de7f808b6bba43d147c4767b0504c3993115475929676acb952bf2bca1dd2e
font_01_sfnt_off00011fa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA2 11100 bytes
SHA-256: 5c25424c4b87aa4513ef87541d9eb628c4fb98194960ebc135d22cb26dda6c61

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