Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc9c79a65c9eb7ed…

MALICIOUS

PDF

75.3 KB Created: 2021-09-05 14:36:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d65a21357e18e55c5968d7b0b8df3d25 SHA-1: e1d978b33e0af33ce716d459ceaf6fd444ee973d SHA-256: bc9c79a65c9eb7eda6196744d53f2d9143c25f7ea176d34a3a15fa9795c4381b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It functions as a link farm, containing numerous URLs that point to potentially compromised websites or disposable domains. These links are likely intended to lure users into downloading further malware or engaging in phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://distriparkbotlek.nl/userfiles/files/65206184307.pdf In PDF document text
    • http://maduraigarlandshop.com/userfiles/file/gozob.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/resiwigi.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8c0410825---tatekavazodito.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160721031cd068---jexubuju.pdfIn PDF document text
    • http://zerosquareonline.com/file/nimiwabezijiladuda.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/mibuzigezu.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/fd2794d254020f6ddb365bdfb5ae8222/vulipuwurejo.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/74288998482.pdfIn PDF document text
    • https://artenika.pl/fck/file/14104479008.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/jipizu.pdfIn PDF document text
    • http://www.yankey.com.tw/demo/public/editor/ckfinder/upload/user_upload/files/57149589916.pdfIn PDF document text
    • http://ck-tct.ru/userfiles/file/45598336854.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/dabapetibefolelubozopije.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4cad25f80---mazifosufozusujuwujapizox.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/98478448982.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2a606b6cf2---lumupera.pdfIn PDF document text
    • http://iwort.de/userfiles/file/12496144374.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/16106f3c1d873d---basetitikapov.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/90704284597.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bef6c48c73---dijiwun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=manual+de+calidad+terminos+y+definicionesPDF 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_off0000bf1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF1E 18644 bytes
SHA-256: f3b4b0c97d0f6110e0ee9f605a548ed7096e64c41f9e3b696579f44605fd6a0e
font_01_sfnt_off0000eeb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB8 10844 bytes
SHA-256: 694697c14449b074c03c01e37ad9a2bacb2596928258aba968b1d7aab056efdd
font_02_sfnt_off000107bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1