Malicious PDF — malware analysis report

Static analysis result for SHA-256 4afdec1f61500f1d…

MALICIOUS

PDF

81.8 KB Created: 2021-08-03 13:14:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4f528ee24d30a8a716dfb383eaa65fcc SHA-1: b8676069c45516266b8864ba9d48e3b3d125032c SHA-256: 4afdec1f61500f1dddc49ae4da2eb2bf5b4d0665a244abf06395fb81c52acb1d
154 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites, many of which host other PDF files, indicating a link farm designed to distribute malicious content or facilitate phishing. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9664

Heuristics 5

  • 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
  • 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://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a250ad1fc52---divaxunu.pdf In PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/9e6d3e129cbbe6885b631457c7801517/45657532529.pdfIn PDF document text
    • https://kontiko.com/ktkweb3/images/upload/files/42235945036.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/likomoxupupixebokopew.pdfIn PDF document text
    • https://irastuff.com/admin/ckfinder/uploads/files/73604424416.pdfIn PDF document text
    • http://stallingreunion.com/clients/a/a3/a37dbb3dca22f8cb40f44de83fe48269/File/10118518667.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/j51ef510td239oogm780r2uok4/volagenidimivus.pdfIn PDF document text
    • https://dimensionshoppe.com/alpha/ckfinder/userfiles/files/tisurawuvubufazek.pdfIn PDF document text
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608260b2cbdf3---tofegarezir.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/a815bc24ffa62a1316d1c4a68d9c771e/muzijisof.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160d01bdcc907b---gofimak.pdfIn PDF document text
    • http://naplesredeals.com/userfiles/files/paxepigewidimilap.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9b5a32709---dufivezidoj.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/64873673920.pdfIn PDF document text
    • http://thestarbusan.net/FileData/ckfinder/files/20210730_1DA372DEEDE530DC.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/nundll5lc7sfbj9p8lckagub6k/11672334683.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/9b8d571b65b2b675752c486864778a11/27905210973.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/fccd6796520f702b4af7ca5e9e68e234/fivelivegalotezis.pdfIn PDF document text
    • https://avonsteel.com/UserFiles/file/rusotifegozobuvo.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/85748686841.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/zirukowedikozenozurajogo.pdfIn PDF document text
    • http://93564497.com/userfiles/tekowukusufareluxitusi.pdfIn PDF document text
    • https://viessmannboilers.ca/fck_upload/file/tevebinujuwifinuzaf.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cafca37780---jafaxitiposozaxux.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/wokavidirodovifol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=moto+italika+150z+2019+precioPDF link annotation
    • 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_off0000e88f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88F 10836 bytes
SHA-256: 70fde8648b6dbf4c9b14225df68f86fd7735878d74363df06242672623ee94b4
font_01_sfnt_off000101d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D7 18492 bytes
SHA-256: 695514de69058b8e02e0eaccee1ab62361260b06a433de342307936e119caaed
font_02_sfnt_off00013142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13142 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1