Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eb58406692e9cbd…

MALICIOUS

PDF

71.4 KB Created: 2021-04-17 18:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 74df9a2778e89e05009f321cd6da58f2 SHA-1: de3965df00918d3d42cebc24755a0254846b5b05 SHA-256: 2eb58406692e9cbd4213aaab0ffd66a2242656d2b460f2ffc3e8e8dc7c193d55
196 Risk Score

Malware Insights

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

The PDF contains a link farm and an SEO redirector, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL points to a domain associated with redirecting users, likely to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://fokemale.ru/strik?utm_term=can+stress+cause+high+blood+pressure+and+dizziness PDF link annotation
    • https://votuwokikinoso.weebly.com/uploads/1/3/4/4/134466575/kibilodoguban.pdfIn PDF document text
    • https://rofewonopanofav.weebly.com/uploads/1/3/5/3/135312507/xuxorotilodobe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e50eee24-2d95-422d-8083-6f618d95927b.filesusr.com/ugd/594ae5_f598c4fe559c4132919aa755f3d100cd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/araba_oyunu_indir_apk_cepde.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f093e2a8-ef9b-4b74-bd82-f14f7ea0028b/58131178812.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/via_ferrata_chamonix_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/375c75ab-1cd7-4af8-a4a6-6856bcd10557/how_to_write_a_personal_values_statement.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/daily_calendar_template_october_2018.pdfIn PDF document text
    • https://438c9214-13ba-44a2-8469-a4c97ff43377.filesusr.com/ugd/5d46a0_10eaff6bec5740c3ac543ffbf0fd96f7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/32f4a078-d5ad-4952-8ec8-a11c5b4acc86/20798484820.pdfIn PDF document text
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_6beefa24a8b543a78d20e646115a7a63.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/seriposuj/avogadro_s_law_sample_problem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/223f8a14-8f67-4274-8260-d026ef1e6d39/why_is_my_amazon_prime_not_coming_in_2_days.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/wemafanumokabozirupin.pdfIn PDF document text
    • https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_9a149e4049c245b194b6319494f81f08.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c4e4218-3ea9-46cc-8ec5-f8dc75669591/43543280860.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/how_to_set_your_marathon_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efcaae8b-4b5a-4494-8ee7-4bc20f4d63ef/janopuvivilujat.pdfIn PDF document text
    • https://ecf8b3bd-8201-449f-a39c-156acd88681e.filesusr.com/ugd/97634b_e3f3c0fd2f1244b8ac15fa54e0230db1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/eff17aca-4850-4c66-929a-9725b8678e80/61763420204.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/i_am_not_mature_enough_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/why_is_my_airprint_printer_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bb92c30-c6d4-4c0c-9290-3871f4b4e941/putitexopapitegalo.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_off0000da24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA24 5432 bytes
SHA-256: c52371915a7a531d2df241e54fafdaed2cd5c2dc073f6ed9b48c2650c05cd1d1
font_01_sfnt_off0000ec8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8F 10292 bytes
SHA-256: 9d25dda0bdecd3a36113b532b184eee04193170e6c55bcb1def346738358e0df