Malicious PDF — malware analysis report

Static analysis result for SHA-256 914768a6f4f2bc2c…

MALICIOUS

PDF

88.0 KB Created: 2021-08-04 23:41:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 75d723b52f0571762223c502c9ff3e2e SHA-1: c59c62b66d93a66e5c0c42dc1f6f8466b78dd240 SHA-256: 914768a6f4f2bc2c569f78573a5309583281ee72167d5a1f978c90de1184e85f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised WordPress sites and disposable hosting. One heuristic specifically identifies a link farm pointing to compromised CMS upload storage, suggesting an attempt to host malicious content. No scripts were extracted, but the overall structure and URL findings point to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/e0bd519a8bf263fee8a9441d80204ae4/dewivadunobusolepej.pdf In PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/2j419590uhkcoij5eb4doc6iee/sujaxuzajejedamime.pdfIn PDF document text
    • http://matsonconstruction.net/userfiles/file/gerolel.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/d244f18c9eac7ef44a82865fbc390f04/tazufelaxupazuwusewifuda.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/kekorunekafub.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a81e08cd65a---56849335343.pdfIn PDF document text
    • https://superpart.com/files/83947863400.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/53647876783.pdfIn PDF document text
    • https://efnnma.org/files/file/65208778361.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/vivilulivu.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b01508ed030---24340053936.pdfIn PDF document text
    • https://sunwayhk.com/louis/STARKGROUP/ckfinder/userfiles/files/rapirilinupakaxovumopesiv.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/furadataji.pdfIn PDF document text
    • https://c-effeimmobiliare.it/file/gezosabadusakuse.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a84e648cb68---pexokaju.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160808d044a911---87103957896.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/77328643793.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d2a5b5136---83784495498.pdfIn PDF document text
    • https://tavio.ru/files/file/90032717044.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/f990c8d1df04674cb736fc1011109260/xeguwekuvabatixofirawuxi.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/958cd348527893e9ad676242ea5eaa8e/zapalesukedipixavit.pdfIn PDF document text
    • https://soccerauquebec.com/userfiles/file/vitoxixavogufas.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/sarawavopererifag.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608333123fbf9---64470618988.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/l55lj0u2c0chl8e29nlulj78m4/24773962966.pdfIn PDF document text
    • http://nfc.soo.jp/file/22326416706.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=update+tomtom+maps+for+free+ukPDF 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_off0000f4e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010cf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF8 10616 bytes
SHA-256: 4585edfd7b2b1dde9719ae5adf1c7cfdbacfabe60b7b1ebe95c54387b41b2d15
font_02_sfnt_off00012550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12550 17068 bytes
SHA-256: 7c7eba8f5c3ffd1574f9d21459fa940bc4a8def74c4adc17c2c77a57a83dcfef

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