Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd2a8b832a0ff54…

MALICIOUS

PDF

83.9 KB Created: 2021-09-01 15:29:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2d87ffd713e51d2dca412a2e9907fcb9 SHA-1: 585b0ea07419bbe1bb0a1184a469bfb4b2e35da7 SHA-256: bbd2a8b832a0ff545b5ac01bba7917670c4fe9725e5a75b92a53c2d5a5bec89d
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm. The primary goal appears to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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
  • 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://wegofa.com/userfiles/file/65883400863.pdf In PDF document text
    • http://ubytovani-budejovice.cz/picture/vtextu/file/vegijubutubar.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/kurejivokataguninomu.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/46eb0ecceab4768fdad4581e2a423b47/98778672209.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce8a971e2a---renixizilokukijurujokifav.pdfIn PDF document text
    • http://axwelindia.com/uploads/31260548983.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/s0g5vhbu4ukni16om0r8i8far6/pobixudizixosefebexiw.pdfIn PDF document text
    • https://markapin.com/calisma2/files/uploads/66290064792.pdfIn PDF document text
    • http://meskerjager.nl/media/files/wuvajewati.pdfIn PDF document text
    • http://faxik.ru/ckfinder/userfiles/files/7397166942.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/59097765121.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16085a5aa54778---52871911803.pdfIn PDF document text
    • https://dhesient.com/media/93794257687.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/783655201.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/f2beefa0f2ffd20f5e3e605fa8f74263/zalibakasig.pdfIn PDF document text
    • https://angkagenap.com/contents//files/vovufefubijumogurakizixeb.pdfIn PDF document text
    • http://www.koeru.eu/failid/file/wumejidujif.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7ce9aa4b3---vejezafusemifobetuwusojeb.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/mamurusumavaname.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/kidizawo.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/sunibezid.pdfIn PDF document text
    • https://shieldtech.cz/ckfinder/userfiles/files/62120277662.pdfIn PDF document text
    • http://millionsdiscount.com/mo_images/files/93855757211.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=can+sleeping+with+a+fan+make+you+sickPDF 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_off0000e188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE188 11248 bytes
SHA-256: 5301bbc315125c44ef48deb4ed2081c3c13515d56abf430365eb1e2a5d417fef
font_01_sfnt_off0000fbd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD8 17440 bytes
SHA-256: 3c3726d566fe6756a42dc2d7d1fc584bfcc9f643d2cc8c7a037852c18ec49a9e
font_02_sfnt_off000128e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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