Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dcfc0517bc226dd…

MALICIOUS

PDF

83.4 KB Created: 2021-03-24 22:04:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 7b1bb67b10ceb53fc323ac1098962dd2 SHA-1: 75ee8f93b7f4df7c9e0da2fa1f2755cc98ab9953 SHA-256: 0dcfc0517bc226dd4211b98388b4bd8de3d67b279303646d85002a571ebd0659
196 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing lure, specifically using a fake driver download for a HP Pavilion monitor to entice users. It contains a mass of external links, many pointing to SEO-optimized PDF files, suggesting an attempt to drive traffic or distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://druttle.ru/wix?keyword=hp+pavilion+25bw+driver PDF link annotation
    • https://cdn.sqhk.co/ninoporaleva/YRigKgh/hide_speaker_icon_in_powerpoint.pdfIn PDF document text
    • https://cdn.sqhk.co/kezixowog/jdGifjj/49531859002.pdfIn PDF document text
    • https://cdn.sqhk.co/resozasevej/chhjge4/guginoxunijevaka.pdfIn PDF document text
    • https://cdn.sqhk.co/bipujawojeli/MmPidha/icymi_meaning_slang.pdfIn PDF document text
    • https://cdn.sqhk.co/tabuguran/3dSsgfA/noxatijenopam.pdfIn PDF document text
    • https://cdn.sqhk.co/wadusazilox/QD7ib5v/commander_cody_band_willin.pdfIn PDF document text
    • https://cdn.sqhk.co/gabadifofibo/mojenid/60743715045.pdfIn PDF document text
    • https://cdn.sqhk.co/puzokopu/ggchhgi/franklin_planner_prioritized_daily_task_list.pdfIn PDF document text
    • https://cdn.sqhk.co/feletitami/jhjeOq5/tapetosimewab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3e1ae61b-6b68-46dc-8a90-d1c7a5b9f91c.filesusr.com/ugd/b8bbd7_8de3954d02804e31b01703c5710b2f5d.pdf?index=trueIn PDF document text
    • https://0c2a7d7b-be9d-4ef2-a94c-09ca905cc17d.filesusr.com/ugd/7d21c0_b8b021318b8b427f8bf575f474cbe389.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/xunisepasaxuvavutinizubi.pdfIn PDF document text
    • https://6f465708-eb37-4ee2-8658-ebeec6cd93ea.filesusr.com/ugd/4bb103_24adc2df2f64451fa55b52ccb6c732cb.pdf?index=trueIn PDF document text
    • https://c18d7360-3707-4bf1-9d6f-52ba7510fa17.filesusr.com/ugd/76cb06_c0306f57f5e1400aa0db2c037168bb6c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fibesezati/marquette_farm_welder_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/62074341363.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/8193121046.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_off000108bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BD 5284 bytes
SHA-256: b32d6a0714bde4a6046c6fc4882f56f19f1bce957a4850909dac850410712d9a
font_01_sfnt_off00011ad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD9 11024 bytes
SHA-256: 6dd563bb26b635762d28886513cbd6299c8c9d00664055c04776be17b5eefb1c

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