Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5ac985dadf32882…

MALICIOUS

PDF

82.3 KB Created: 2021-09-11 21:07:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3387bbcdda66a43d699b9547ea803f89 SHA-1: 4ace17f279c7f591197d05c75d9eb37929cac26f SHA-256: b5ac985dadf32882e538ea0f5ef3532e4953259eeb9979ee6ea8a73539414ac5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm or phishing attempt. The 'SE_INVOICE_LURE' heuristic further supports the idea that the document is designed to trick users into clicking these links, potentially to download further malware or phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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 http://paroissedementon.fr/upload/files/sogeva.pdf In PDF document text
    • http://wpchkg.com/upload/image/file/58574444797.pdfIn PDF document text
    • http://masonhn.com/d/files/zifopitusawijidinul.pdfIn PDF document text
    • http://daiichihousing.net/uploads/news_file/48897199618.pdfIn PDF document text
    • http://chpcentre.com/files/file/livamubotuwete.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/zebizadabakagid.pdfIn PDF document text
    • http://eyela.kr/uploadfile/fckeditor/file/76481765454.pdfIn PDF document text
    • http://fecirturizm.com/resimler/files/31832155209.pdfIn PDF document text
    • https://riminabda.sk/userfiles/file/98183586693.pdfIn PDF document text
    • http://timebymtm.com/upload/files/potuzapo.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16131c529ab09b---67071139807.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/161369f0b6c5da---22853829411.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a1ae21cc31---vukakiwijadoferiwewa.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/16139c642bdb7f---96478342923.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/32992662556.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/medazulaweje.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/044f500a4b7b18617685c79edc64a0b2/lesuxev.pdfIn PDF document text
    • http://alarm.pl/userfiles/file/robumepokizukogagop.pdfIn PDF document text
    • http://alituncer.net/userfiles/file/sebenegararover.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/40228612194.pdfIn PDF document text
    • http://tano-cable.com/d/files/wawakosene.pdfIn PDF document text
    • https://kawanmto.org/contents/files/81885132479.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/pawinunileronerug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=how+do+i+get+access+to+a+private+instagram+accountPDF link annotation
    • 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_off0000dc00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC00 17744 bytes
SHA-256: 08a38cae165ba0cd097c2e7d70f05f2a9dc54a6092f3ef321e0f8eff45170c5e
font_01_sfnt_off000109e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E6 11052 bytes
SHA-256: 181aab6e0a6e8248eb23c55ba030130355cadf6d81f2918246ca2d9aeff3c955
font_02_sfnt_off0001237b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1237B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.