Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e96ea91f3953087…

MALICIOUS

PDF

99.0 KB Created: 2021-09-24 06:23:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c64593e69021446f18477263c6c89eb6 SHA-1: e72ec208f60e2ab677b6db9e6885ac9bc7909bc6 SHA-256: 0e96ea91f3953087747c1d4514ec3ca2e08fe96381fe1577fc825ba92efc9195
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicative of a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The presence of 'utm_term' parameters in some URLs suggests tracking or campaign-specific lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9739

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 link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://chcial.ru/uplcv?utm_term=music+mod+apk PDF link annotation
    • https://itchanoi.vn/uploads/news_file/ridumipepa.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/f2i9s8sk1nfomjahdrh6vpvr97/22624859587.pdfIn PDF document text
    • http://meskerjager.nl/media/files/31418902084.pdfIn PDF document text
    • http://spl-designs.com/ckfinder/userfiles/files/gexizanemeru.pdfIn PDF document text
    • http://xn--80aap0abfiql8h.xn--p1ai/admin/ckfinder/userfiles/files/19010802938.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131af5da390f---87340497961.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161407dd98c33f---lameni.pdfIn PDF document text
    • https://firsatpin.com/calisma2/files/uploads/kibotomigabepepob.pdfIn PDF document text
    • http://bivalyracing.hu/files/file/95354187490.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/vonavufisizakefituboreba.pdfIn PDF document text
    • https://worldtradezone.com/userfiles/file/90673412709.pdfIn PDF document text
    • http://bdsps.org/slbdavbatala/userfiles/file/12142634033.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/66959702b805c3f496c90cc9c6d7a9e7/32590839968.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/a2ea4d1ba79cb3ff54f47ec0edd1a20b/wexemapizugigupamub.pdfIn PDF document text
    • http://burragebrothers.net/demo/jolie/beta/userfiles/files/dobafasivajaz.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/wumuwewuxodavuwidezezone.pdfIn PDF document text
    • https://fleuriste79.fr/ckfinder/userfiles/files/26239101328.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/51860699345.pdfIn PDF document text
    • http://h-st.nl/bestanden/files/gegezopora.pdfIn PDF document text
    • http://kasargod.net/uploads/file/jexikapezu.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd01baac7c---32454399831.pdfIn PDF document text
    • http://www.hebrewforreadingcomprehension.com/content/lijogul.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/vukanazizudatomu.pdfIn PDF document text
    • https://uangraja.com/contents/files/73274678557.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE800 16636 bytes
SHA-256: ddc8c44e5020d686a257d0e61c161d1b89a05f1ebe9d37b44ab0a7f428c69404
font_01_sfnt_off0000ff98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117AA 27768 bytes
SHA-256: d128da8b11be4c198f7adb842e324703a8b32b4023d23e0975bcb8f3be8f0be9
font_03_sfnt_off00015c9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C9A 10380 bytes
SHA-256: b092cb2ee7c1b0925b58ac098a234ed5d9957007d988ea1fab8bfba067200a42
font_04_sfnt_off00017413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17413 2204 bytes
SHA-256: eed4b5e3cd62036562e2af5f5a4f7dad6e310bdd94dc39225c2b9366a5c24847

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