Malicious PDF — malware analysis report

Static analysis result for SHA-256 069587a41b680cf3…

MALICIOUS

PDF

72.1 KB Created: 2021-09-23 20:26:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0b3f8ff2120bc20112a09b55bb7fe6a5 SHA-1: 605e0b1b858f6dc8afdf29134a169c210c063412 SHA-256: 069587a41b680cf3bb226bde248b3f37b12cec53ba57f3081779e25802792b65
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised websites. The PDF structure and embedded URIs suggest an attempt to redirect users to external sites, likely for phishing or to download further malicious content. No scripts were extracted, but the PDF's nature strongly implies a malicious intent to leverage external resources.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4060

Heuristics 5

  • 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
  • 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://catamma.ru/uplcv?utm_term=how+to+change+mobile+storage+to+sd+card PDF link annotation
    • http://studioassociatoemc.com/userfiles/files/nogaladusujupezok.pdfIn PDF document text
    • http://plafondchauffant.fr/img/user/file/19418189272.pdfIn PDF document text
    • http://spartaksedlec.cz/spartaksedlec/userfiles/file/zokojubosutel.pdfIn PDF document text
    • http://shimamura-mail-order.com/userfiles/file/jaxufanafokelerafer.pdfIn PDF document text
    • http://roycraft.ca/userfiles/file/xipijurafopalisez.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/20139784247.pdfIn PDF document text
    • http://amindoost.ir/images/upload/files/45802562607.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/42057584354.pdfIn PDF document text
    • https://cfi-registration.amyhalter.com/buzzboxgift/img/userfiles/files/xitadujelataxaje.pdfIn PDF document text
    • https://educhina.mn/editor/files/lodeg.pdfIn PDF document text
    • https://innovativallatgyogyszer.hu/fileok/file/64640881725.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/u5e87gkpjp6kqe4ohhv37ub16c/5352790503.pdfIn PDF document text
    • http://iucecb.com/files/file/zawevatuxidapurizat.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/81034256074.pdfIn PDF document text
    • https://businessincasey.com.au/application/third_party/ckfinder/userfiles/files/vojakut.pdfIn PDF document text
    • http://hexindechem.com/upload/files/5278918843.pdfIn PDF document text
    • http://bhhangkhong.com/upload/images/files/79363950640.pdfIn PDF document text
    • http://ltptech.vn/uploads/userfiles/file/rodazuratewowila.pdfIn PDF document text
    • https://mbzgogo.xyz/web/img/podborky/files/firunezenonaxivixeweluvi.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/9ff41khv0sraa074k05am806sa/65724525708.pdfIn PDF document text
    • http://hacoauto.vn/upload/files/duweta.pdfIn PDF document text
    • http://crestviewshopping.abwingsmd.com/uploads/files/dimar.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16138905fc8690---15007106825.pdfIn PDF document text
    • https://hw-power.com/uploads/ckfiles/files/61378c576aa5a.pdfIn PDF document text
    • http://j1medical.com/uploaded/file/zexamamuxuloxel.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D1 17756 bytes
SHA-256: 5225aba66054fb1b9e1a568a4b460067edddca71193cadca477f61c0fb403385
font_01_sfnt_off000102dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1