Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c95ea41cec6464a…

MALICIOUS

PDF

82.2 KB Created: 2021-03-18 22:32:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: ad229254a92307d4836f82abac2c644f SHA-1: d3be91b28ffd5979363da98b50d70319b210a1ba SHA-256: 2c95ea41cec6464a69dd5c379c645abd3a1be1f3762afe5ed1196499760f1692
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a lure related to 'networks growth and expansion answer key' which redirects to a suspicious URL. Heuristics indicate this is a phishing attempt, likely to steal credentials or deliver a payload. The ML classifier and ClamAV detection strongly suggest malicious intent.

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
  • 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://soxebez.ru/wix?keyword=networks+growth+and+expansion+answer+key PDF link annotation
    • http://brightshopbg.xyz/what_is_the_best_anti_inflammatory_diet_for_weight_loss2shss.pdfIn PDF document text
    • http://sevixewevutan.22web.org/ringtones_telugu_songs_free.pdfIn PDF document text
    • http://republvinb.fun/python_stringio_to_csv_filefze05.pdfIn PDF document text
    • http://xapozekaxo.iblogger.org/autosketch_2._1_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jobavo/the_crucible_act_1_audiobook_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/data_analysis_tools_and_techniques_pmp.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/enriques_journey_chapter_10_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6af3845e-00cf-4ac6-8702-49e30675e453/canon_mg6320_print_head_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/fafutogupedamimofit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/434eb17b-b408-4805-a8bf-5e59957a8e5e/53271058295.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bc770ef-b45a-4456-a1ca-3922c63116f0/adobe_premiere_pro_cc_2020_free_download_for_lifetime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9da2fa90-c626-4f15-8c3b-272cdeae5c1a/disneyland_refurbishment_calendar_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5640de1e-2671-473e-a813-a50c1370c4e1/60697640996.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/94327279063.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/wix_responsive_website_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/gebewuxizeritedal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f7e4607-9e89-4559-b2cd-c7d589aec70d/31288276772.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F7 5272 bytes
SHA-256: e0f1c35a7fed5fb691c522fea3507a6c3e3e75fb0225fbbee056b1fba7c0b974
font_01_sfnt_off000108fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FB 10748 bytes
SHA-256: 9c7dae2a27f7e85bacf06e5a7bf2b0af99cd819cefc7867c4875f6c9ea5f8357
font_02_sfnt_off00012dc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC0 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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