Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f91154ad2cca133…

MALICIOUS

PDF

73.2 KB Created: 2021-03-21 12:19:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fe8e0661bf1656afc765848c4a160711 SHA-1: bb37788e1ea3ef7f0a1d4cdf661cd1b4dcfe3d12 SHA-256: 9f91154ad2cca13309076f700be4a6fc2f71865a59b761cd7881906eb480823e
136 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 ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI and a high-severity heuristic indicating an image lure linking to an SEO redirector, which points to the URL https://xajibur.ru/award?keyword=norma+astm+a36+en+espa%25C3%25B1ol+pdf. This suggests the document is designed to lure users to a phishing site under the guise of a free download.

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://xajibur.ru/award?keyword=norma+astm+a36+en+espa%25C3%25B1ol+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408991/normal_6004e05d66f70.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutowede/jd3jdet/vibedejepikumolixurusaja.pdfIn PDF document text
    • http://justamorem.com/vizilewixowisasopobwi85.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371005/normal_5fef653d90894.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393036/normal_603c37d02be7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467287/normal_5fed1451bafc6.pdfIn PDF document text
    • http://xoxosedefoxadu.mygamesonline.org/how_to_connect_bluetooth_headset_with_smart_tv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494149/normal_5ff713927b41b.pdfIn PDF document text
    • http://shoop-fh.ru/crickets_meme_sound_effect_downloadbw1dn.pdfIn PDF document text
    • http://jomikifu.medianewsonline.com/povonoposunexulepikuduxak.pdfIn PDF document text
    • http://meroxisawifagu.mygamesonline.org/online_editor_to_word_document.pdfIn PDF document text
    • https://cdn.sqhk.co/sewujuzanas/hcibpPe/57132495808.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409997/normal_6035e4a117f4c.pdfIn PDF document text
    • http://vexetifiridik.mypressonline.com/belgrade_city_map.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b098dbe3-779e-426c-9a39-50c59b1f19a2/nufujut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e81ada8-86d1-411f-88d3-217e3c0ef51d/how_to_make_your_sim_go_into_labor_cheat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a75714a0-c293-48a6-9d75-2946a85fc05c/bowflex_xtreme_2_for_sale_used.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/075a04af-4535-4f6a-8c71-048c9e8bf7a9/bowuwadukumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8d1138f-d15c-4800-8256-a186f7773a41/20260744185.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB17 5684 bytes
SHA-256: 03ed3bd6901794af43232c97a883e0f7a9df13beaaff105c832ada2cdea01661
font_01_sfnt_off0000ee0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0B 12204 bytes
SHA-256: 680f68305c8d86ae5ca2b4f4cc73146bbd2d9bb190466865c52672a010e539d3

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