Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1f710041c6392dc…

MALICIOUS

PDF

91.4 KB Created: 2021-06-27 22:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 37f47e7b6e89916c86fe7818c2aa4b2c SHA-1: 916d149c73253c72e4c47b896c0da26f16b3fec8 SHA-256: e1f710041c6392dcc8f655ffebf0034ba9b816b3ec4f8b357e5527243d8bc00b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crewmak.ru/uplcv?utm_term=tubemate+apk+for+pc
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160bc053668c01---waruramazuj.pdf
    • http://nsfeed.com/_UploadFile/Images/file/21411771494.pdf
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/465cb85e7a02e0be27be1cb3b1cc7aef/salezezeduzutufim.pdf
    • https://aawyx.com/sites/default/imageuser/file/zukafisekasib.pdf
    • http://exhibitionchannel.com/upload/74520123948.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160928779a15bb---40246229454.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa13ba6e64---85658081755.pdf
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/gvkbo538s5q7746000f44o9e9f/tujinoperoxovidurotinuwut.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a8900cab904---59343599568.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c42176ea00---26273226438.pdf
    • https://xn--fct8ml6mwue.tw/uploads/files/30279734694.pdf
    • http://aucoindeshalles.fr/menu/file/48876414617.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/vd90f58sq7kiaur6296m5qaoig/dagizepapilatawimug.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/3hp7ke9ln85h9r3su99uscdjfq/89726431751.pdf
    • https://laflammerouge.ch/userfiles/files/12501474324.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f97841d50d---11832985898.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16079ce1aa73f1---katenatonukumenirofa.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b746776965f---wokazeji.pdf
    • http://ladyvenus.it/userfiles/files/8182382575.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb00e2b299---ruvoduzavakaxonovolegedod.pdf
    • http://stolizstekla.ru/userfiles/file/34841288970.pdf
    • https://petikdaun.com/contents//files/gurew.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/mrq2vq8s8i7j5ifadt6u6hl11i/dovupotutasenigawe.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/7eb4d3fc45ea5d47bd68b5d035a6741b/karediru.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee5f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5F 16792 bytes
font_01_sfnt_off00010671.bin
ae7bf9d5b49e09085cfdbbb6d7204bc08036260804bb1655332ee27d4151faa3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10671 16824 bytes
font_02_sfnt_off00013243.bin
bc89b4ae549aa57f52fc9a8efe905daee9e8b827bb1a5b56dd11ee308a78fbd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13243 10524 bytes
font_03_sfnt_off00014a13.bin
5cd8a120e106fc2d4fc1855603a636a3ce922decfb1b4d98f17a4a5450337c58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14A13 16344 bytes

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