Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b9aa3ef45a25dc…

MALICIOUS

PDF

80.9 KB Created: 2021-05-23 14:40:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: c2a5a9a11bf39c8f6bdda5e9b7c640e5 SHA-1: 22a5b1be4a36359203e8aa7a2672c66f73e3d5b8 SHA-256: 15b9aa3ef45a25dc02ecabd92f33d118de4bd516086a4141d8ad7d4d4e870a69
204 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL that redirects to a download lure for 'Minecraft bedrock edition', suggesting a phishing or malware distribution attempt. The PDF also includes a large number of external links, many of which are likely part of an SEO link farm designed to obscure the true destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jottigo.ru/strik?utm_term=minecraft+bedrock+edition+download+mac PDF link annotation
    • https://xujebope.weebly.com/uploads/1/3/4/0/134018561/rikik_zikukavinulok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528780/normal_5fd8278642372.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403408/normal_5fe993e98d6fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465709/normal_5fd7310ab6a90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457847/normal_605309a57e0e8.pdfIn PDF document text
    • https://gunowiwusofemu.weebly.com/uploads/1/3/4/7/134705227/3042274.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://uploads.strikinglycdn.com/files/942f7a2b-3706-4b7c-8a67-7ca8267f2b32/what_to_eat_daily_for_healthy_life.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6816c769-2d74-47de-a694-05afbed305b8/83270291643.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/520fd0cf-6f6a-43c8-8353-ed06e19d5dcc/what_is_gyan_mudra_yoga_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4929ffcb-5f4d-4539-bd42-50f074b2931b/how_to_get_3_digit_voice_response_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8026dc83-e617-4a71-a3c4-c4d141aecdfa/22093175381.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fc79a63-19da-4a83-a2a4-a8158232464f/59257170906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9851078d-ca55-426c-90be-67cc87bf23df/39370316882.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/449aaa6b-9234-4704-acee-860e5d06857d/wirawawemotijupepudi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a71ad0ef-1f9a-4cda-88b5-06d5bbf6c3c2/70591102574.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57a657c7-839b-45d6-ad19-6069eeb441f1/sony_bravia_32_kdl32w660e_full_hd_smart_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/021c3c63-d0a6-4237-afe3-f05c8e7555db/34461415542.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b040c914-0761-4465-90d8-921dacd367f8/value_investing_from_graham_to_buffett_and_beyond_by_bruce_greenwald.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f5257d4-cb9c-49d9-bcb3-7c678a36d124/70430642921.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e4dd2c0-4fb9-42c8-ba98-cec78edae33f/xibigojorujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0a30e13-e55e-4c6c-b723-f90777555656/tepomuvawadegutubi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bde1886-eb91-4889-b88d-7aa7edec862f/science_fusion_the_dynamic_earth_answer_key_unit_4.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EE 5080 bytes
SHA-256: f578402d4e1c790e225b5472eb1397101d8754cfdcbc7a9cb7fc9d24295d27e2
font_01_sfnt_off0000fb23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB23 1860 bytes
SHA-256: 46154e3248329394e1e71a5470e7a8fd614279f4ac480bf7fca7f5601b7de7b0
font_02_sfnt_off00010434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10434 10444 bytes
SHA-256: c59d7ebb64698e3071aea7ef689177480ae974139cf3be57242f8c88b120f40d
font_03_sfnt_off000127a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127A9 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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