Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e646717ca6cb2f1…

MALICIOUS

PDF

85.0 KB Created: 2021-09-05 14:36:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 060a2922698c41705a4541449e6f9047 SHA-1: bcc14f37a20ec35d5810cf841677df865e9d39bd SHA-256: 6e646717ca6cb2f1ddb24c3757ce01c34494482472e791f24ad9bc80b69c4ff1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to numerous compromised CMS upload directories, a common technique for distributing malicious files or redirecting users to phishing sites. ClamAV and ML classifiers strongly indicate malicious content, specifically identified as Pdf.Phishing.Trojan. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to obscure the true malicious destination and potentially leverage SEO tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://makiriaszto.hu/ckfinder/userfiles/files/32897169119.pdf In PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072466e56ce7---xofizuvofawufagepekoto.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/f1ca951c5077a17b7450f0cc12ff05e7/nilorama.pdfIn PDF document text
    • http://ac-kenigsberg.ru/files/file/44310578626.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/10292565464.pdfIn PDF document text
    • http://rghsalumni.com/clients/82979/File/nesepolubevezonaxom.pdfIn PDF document text
    • https://elmaga.lt/components/com_mijoshop/opencart/image/data/files/37998936980.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/f2jmvebjopbh6ve4vcei5mvsl7/34244665457.pdfIn PDF document text
    • http://cappellastudio.it/userfiles/files/rujojuzit.pdfIn PDF document text
    • http://tarnava.eu/user_images/file/fojirulunigefo.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/mupusexenijadijuxugil.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b412270df69---fagowiliv.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/ngdinbcgnacm1it7b5rk2tb8q1/mobiwalir.pdfIn PDF document text
    • http://kubkao-kubpla.com/userfiles/files/sofewubigo.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/jejumuvisawolegowape.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6439110807---bidowezufutiwarujezaxesir.pdfIn PDF document text
    • http://kingkady.com/uploadfile/files/xefosujinonuxogulo.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3903637be---wulixine.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/3139f691b8db3eb70ad5f8233c030bc7/45744419531.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/c1jkchulimr21rj5nnirr2ahgf/vilejomora.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/70540ae1398db58934973b6cd8851869/xezatuwiverujekowosoz.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608880eda3e7a---guwenigu.pdfIn PDF document text
    • http://aligokdemir.com/resimler/files/92245932588.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/5ums0qc0367rghmncceg7b1mqj/17505764940.pdfIn PDF document text
    • http://www.slenderclub.cz/ckfinder/userfiles/files/9941971994.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=rheem+electric+water+heater+manualPDF 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_off0000e7de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DE 18184 bytes
SHA-256: 87ef959c1e20adf8100a6c777a40a99e8343f7ca627d6103c21d34c25f71dc2d
font_01_sfnt_off000116e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EFF 10436 bytes
SHA-256: 3477f4ffc623f6ea61425a1f7f30ebdbc0e5e10ceb09c8a26c1ad86dfc982d0f

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