Malicious PDF — malware analysis report

Static analysis result for SHA-256 03695317897cf4ad…

MALICIOUS

PDF

80.0 KB Created: 2021-08-29 12:23:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 290528ddd66f237f8ddf326f4149bc09 SHA-1: 1b2614ccb7d671099ab245efab095de9cddd7f21 SHA-256: 03695317897cf4adbde87357f4e315d8382a8dadcd800752884d82c869a15b8d
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, directing users to numerous external URLs hosted on compromised WordPress sites and disposable domains. The primary purpose appears to be luring users to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://nomylo.ru/uplcv?utm_term=free+fire+free+download+apk PDF link annotation
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887fff6dfc9---velegiw.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/99102933595.pdfIn PDF document text
    • http://mastrodibaglio.it/userfiles/files/reletolikeb.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/e96c4082264a9d62852711cf47150ce9/3282407104.pdfIn PDF document text
    • https://nuttydog.hu/ckfinder/userfiles/files/72679123554.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bafae59b335---botivevefeje.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/bfccd4d1e53f61c20b0d381dbf5b2578/sipiw.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/f34966ee53603cff7fa1dab63e573fa4/31913297629.pdfIn PDF document text
    • https://digireg.ru/upload/nukizeta.pdfIn PDF document text
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea4cd0724e---21725903509.pdfIn PDF document text
    • https://mehreganimaging.com/images/upload/files/41991355973.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/2cc0fdc28c5946fc5142d7ddc8d86fe4/jepowej.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1f2bd4408---temefowomapovakozix.pdfIn PDF document text
    • https://digireg.com/upload/87991507319.pdfIn PDF document text
    • http://canadanur.com/resimler/files/61210705024.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/20655224954.pdfIn PDF document text
    • http://toroisg.com/public/images/files/kubisozuwaxoxopude.pdfIn PDF document text
    • http://getsolarnj.com/userfiles/file/39000181116.pdfIn PDF document text
    • http://l-max.ru/userfiles/file/mexukigamukafipeba.pdfIn PDF document text
    • http://upnbkk.com/file_media/file_image/file/nixesusozatusu.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/a5cce9a6fb3e818a0e25d9ff5b603c55/230123568.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/selinamev.pdfIn PDF document text
    • http://thehonourride.ca/clients/c/c2/c2a221447f3e921143a55eca482c8289/File/voxarusulupumedabolo.pdfIn PDF document text
    • http://whs1963.com/clients/7/75/758a827d59fb1c2827eec60421ffdc22/File/50314153330.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/4b5d903033ee85b6f5162ee0f9404828/37646127742.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_off0000d31a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31A 18320 bytes
SHA-256: 29c4c3242fe546e968a17ae8cabb58ca1e6d7a12625769ff97771dd6d76d4261
font_01_sfnt_off0001023d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A54 10380 bytes
SHA-256: 00e7d140bffe1da55c4a714a54f910ed6def3b04dd791667919cf3b9a08493a8

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