Malicious PDF — malware analysis report

Static analysis result for SHA-256 193eb62b49dc24f9…

MALICIOUS

PDF

83.7 KB Created: 2021-09-02 15:42:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8a87b92472380e080b1229d0283933d8 SHA-1: b9000b52c7908565a20aa92a40bb990ea9d110d1 SHA-256: 193eb62b49dc24f96d4acf987381632054527730e2d4e83d1911e4a6111061f8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a phishing or scam campaign. The presence of 'utm_term' in one URL indicates a potential SEO-based lure. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely involving redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://huntic.ru/uplcv?utm_term=telecommunications+engineer+job+description+pdf PDF link annotation
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/mrqhr03nomc8380rbnl2tqnebs/17810182878.pdfIn PDF document text
    • http://osrclass1967.com/clients/8/84/84e84eb3bb32f45446e669e24fea3ebc/File/zefililopaza.pdfIn PDF document text
    • http://rsst77.ru/upload/files/43941474318.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/86296523755.pdfIn PDF document text
    • https://makanbanyak.net/contents//files/danakoditod.pdfIn PDF document text
    • http://www.uds-myanmar.com/image/upload/File/zukomatefudop.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/0f2a6d6f0115bb6d029e16763e9562ec/37556784210.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d242b738894---zazute.pdfIn PDF document text
    • https://simon-daulte.com/ckfinder/userfiles/files/varepososizigefukima.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f5c03c364---bojivisukubutafaxer.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/japebexubazixar.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/63969259704.pdfIn PDF document text
    • http://makingtheturngolf.com/clients/9/92/925d9bae4ecf380f28dbe0e1390c16eb/File/73427475311.pdfIn PDF document text
    • http://wingmanplanningdemo.com/userfiles/files/12915556084.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/pujefuxazifoliw.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/sukiterexumubu.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210503221029108.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779b6da6f94---rotarubitupez.pdfIn PDF document text
    • http://zonwering-belgie.eu/ckfinder/userfiles/files/7743828464.pdfIn PDF document text
    • http://hrt-foto.hu/_user/file/27980741289.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b54a728b79c---vagebewo.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/or94jn7h7pf8lm9kghtvavms63/vomizevusibus.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2a1f70e6c---65319798004.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/witodimajuxovevixujak.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f56c208edd---12519555529.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA42 11296 bytes
SHA-256: 2e3408221dc84bdff929407beb61c73735395732e0469ba65954e7b40c82284c
font_02_sfnt_off0001144d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1144D 17232 bytes
SHA-256: e1f0c5459f144c8eb889f8c0fb29e77dd18aa076040721670a7389c5b08478c9

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