Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd2a33ffbe054428…

MALICIOUS

PDF

90.8 KB Created: 2021-08-13 21:11:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ebda8936fe9efcc582789ebcf66a81e7 SHA-1: 2856c870ebcf3217a14ef9e110cfc00dd010e525 SHA-256: fd2a33ffbe05442843b21b67fd144f9fab9c079f2806935fdc18fe101fb99f79
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external URIs and links to compromised CMS upload storage, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing or malware distribution sites. The primary attack pattern observed is the use of a malicious document as an attachment to lure users into clicking on these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://medvor.ru/uplcv?utm_term=list+of+borg+warner+transmissions PDF link annotation
    • https://aimtronu.org/userfiles/file/ketiladuluvugazarukel.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/f545c64f748e78683cbbec2248a46fd4/nolilow.pdfIn PDF document text
    • http://idcla.net/upload/files/siwofuv.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/47002740909.pdfIn PDF document text
    • https://postelezmasivu-ostrava.cz/ckfinder/userfiles/files/jebijotenodemomeka.pdfIn PDF document text
    • http://studiodugnani.it/userfiles/files/tizaxaso.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160826e201de8b---76156619525.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805951931b5---tululakofotumurolesa.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad737a96190---82497969020.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebfcb99ca3---80366019754.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/pakikajokakakapaze.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/31792155129.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/49954532481.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085f49d1afb2---62113606176.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/4443643914.pdfIn PDF document text
    • http://tractortools.cz/ckfinder/userfiles/files/zumarixakemon.pdfIn PDF document text
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/72287043402.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608ffdb4b6aa1---zupulede.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609e343c98309---45858531134.pdfIn PDF document text
    • http://temple.mo/userfiles/file/89791614658.pdfIn PDF document text
    • http://dtpokebar.com/uploads/files/34943209333.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/9e7d62fe454e3e193df8ada6018a0833/18026137716.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF675 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8C 10696 bytes
SHA-256: a6524812138e2f7b200e15f966359e14666d0e22b226e9e06dc760588f297fde
font_02_sfnt_off00012732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12732 17496 bytes
SHA-256: 720a1c0d5649a50da7122c1f082f4f306f7d7081f92d9d4675c411cd704b1f44
font_03_sfnt_off00015455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15455 1728 bytes
SHA-256: db362e12dbfa314e5387ae120b900bd78ea82835ababf60feda67789cabae7aa

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