Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dbeacb3ba751555…

MALICIOUS

PDF

83.5 KB Created: 2021-09-09 04:06:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: fcc3988e9432b435ad146d5e39fb3b5d SHA-1: 294f22ee4b2f8d1934b347413c23fafff219b268 SHA-256: 9dbeacb3ba7515554708cac19aba9eea8bbe6fbe5cc20d73bb668c24b310117b
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 domains, indicating a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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=deactivate+voice+control+android PDF link annotation
    • http://lagerunda.it/public/upload/file/bopigawotutavejonulewozu.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/nivokejodovugafugumi.pdfIn PDF document text
    • http://xinxinhouseware.com/uploadfile/files/kanigo.pdfIn PDF document text
    • https://mmrh.myagenda.cz/pictures/editor/files/gifipisa.pdfIn PDF document text
    • http://tecksco.com/upload/files/tovazenuriton.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/bulebexemebubowuvu.pdfIn PDF document text
    • http://www.boldino-hotel.com/ckfinder/userfiles/files/10988954328.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/punubagosibivasaxas.pdfIn PDF document text
    • https://francemonde.news/UserFiles/file/22383150367.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/p9ogqvht8kj1dmru4jfhtpea7p/zetibazumogaritet.pdfIn PDF document text
    • http://vakoplus.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/40238471558.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/a22531548a76903ca552c06b922b75d9/pesopitujawa.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613931b171660---jitasusopawenad.pdfIn PDF document text
    • http://stmrcstvm.com/userfiles/file/58567754639.pdfIn PDF document text
    • http://library.nesdb.go.th/ic/admin/ckfinder/userfiles/files/75877623552.pdfIn PDF document text
    • http://tmtechvn.com/webroot/img/files/22196625864.pdfIn PDF document text
    • https://ketex.com/trcgp/ckfinder/userfiles/files/39288748169.pdfIn PDF document text
    • http://theponghop.com/upload/files/danedukafu.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/burukobimonekumugusor.pdfIn PDF document text
    • https://luatkhangthai.vn/upload/fck/file/zemilikisijusa.pdfIn PDF document text
    • http://fuerst-architects.com/uploads/file/wemiwutagukipudavogosan.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_off0000e2bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BB 18108 bytes
SHA-256: 45d85442cbb94c393555c62551449cf15c0781e6319cea166e7f09fa39e7d461
font_01_sfnt_off000110e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E4 10264 bytes
SHA-256: a9158e2efe4c9a80b0772c05a30806056856d0f1fc7f57f171620547a4a4fcdf
font_02_sfnt_off00012819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12819 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1