Malicious PDF — malware analysis report

Static analysis result for SHA-256 855f1a0a90166ca6…

MALICIOUS

PDF

70.1 KB Created: 2020-12-16 18:10:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 19155fdc804b4d61a16bccdc89305bbe SHA-1: 002ca7b81004075d783c61246c856ba1eb4b1122 SHA-256: 855f1a0a90166ca616701577322e2c15ddee1f54aa5f34ca4f06dfd1add746c8
254 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/wb?keyword=performance%20budgeting%20pdf In PDF document text
    • https://ramakizuwag.weebly.com/uploads/1/3/4/3/134321509/dea51de84.pdfIn PDF document text
    • https://zavebunerug.weebly.com/uploads/1/3/4/3/134358754/9230769.pdfIn PDF document text
    • https://vobiromab.weebly.com/uploads/1/3/4/6/134653190/53efd176ae57219.pdfIn PDF document text
    • https://xefafarorul.weebly.com/uploads/1/3/4/6/134698093/4161f28.pdfIn PDF document text
    • https://megoximigiwuboz.weebly.com/uploads/1/3/4/5/134579220/duxelolifigewanesota.pdfIn PDF document text
    • https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/fetotuxuwimi-vokurakemusuter-simuwore.pdfIn PDF document text
    • https://papilezuserif.weebly.com/uploads/1/3/4/4/134437149/8895964.pdfIn PDF document text
    • https://rexolofozex.weebly.com/uploads/1/3/4/3/134368018/bixekadum_muzisudileror_faxepelitusebif_lulaxemupuliga.pdfIn PDF document text
    • https://femekeviwafuga.weebly.com/uploads/1/3/4/3/134345727/dizulazujozi_woxijarerusu.pdfIn PDF document text
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/f6f8dbdf959.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc11cf00a2757459be424fe/t/5fcf3e923fa051062b435e72/1607417491719/gopro_max_360_camera.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3979ae5c7695ca9ac7d5a/t/5fce2e9a8a55f2188ba16925/1607347870935/galaxy_watch_3_blood_pressure_monitor_usa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffe61bf71053ccb0b2b06/t/5fc36d71cb3e0f5771bc1d34/1606643057788/ratuvuzuzo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc298325e8e827d4298aebe/t/5fced579798354522dfebe93/1607390588014/download_the_escapist_2_pocket_breakout_apk_original.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc332fed26ff1194f82bd0c/t/5fcfc26530d68a2426db6e0e/1607451239340/41638199734.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_off0000d690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD690 5404 bytes
SHA-256: 20a44811d9904a6e9ab4d858036604df070927a84ccc9ece268ad100d32b96f6
font_01_sfnt_off0000e8d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D7 10188 bytes
SHA-256: fb5411c461ac30bad9af1ebeb646e6037bbf1abc1fb2c8d275eb3712a3db13e9

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