Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed08b066faea15f5…

MALICIOUS

PDF

83.2 KB Created: 2021-09-13 06:15:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 2186680d00437c5f2648cecaf6265581 SHA-1: 4abe6b4c710903637b7caf7f2e109c6f26e52ab6 SHA-256: ed08b066faea15f551539f215e071084cdb117b05191e400ea5232a37c9dfbed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish users. No scripts were extracted, but the presence of external URIs and the link farm structure indicates a likely attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://netshopnepal.com/userfiles/file/25851749605.pdf In PDF document text
    • http://mislenyiallatorvos.hu/userfiles/file/rajosapoxujiwurubonarej.pdfIn PDF document text
    • http://wwsm-hk.com/files/file/bujabujubixerat.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/dd7ca3f120d228d23fc72fa17243d5b1/53203800654.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613cee870eb3c---wasivumiwatel.pdfIn PDF document text
    • https://hagakure.by/upload/editor/files/pipasavoxuzulo.pdfIn PDF document text
    • http://soundspace.eu/Upload/file/fasebarezetavawobovasub.pdfIn PDF document text
    • https://www.leasing.net.in/ckfinder/userfiles/files/34635384815.pdfIn PDF document text
    • http://planbmedia.hu/files/sizesujaradojas.pdfIn PDF document text
    • http://a2hgghk.handylover.com/upload/files/70960132810.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138d40ab8e2c---19818350361.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/darajujipejivupenukegojo.pdfIn PDF document text
    • https://skillmapmagazine.com/ckfinder/userfiles/files/60685055238.pdfIn PDF document text
    • http://lehnerkom.de/images/uploaded/file/mapevodarimiwabitu.pdfIn PDF document text
    • http://www.integra-cr.cz/administrace/ckfinder/userfiles/files/fowep.pdfIn PDF document text
    • http://levotst.com/uploads/files/51391948137.pdfIn PDF document text
    • http://electronicaindex.nl/images/uploads/40321730637.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16138112e22285---84983132685.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/7c44715af4ee28c9c6911bdd473f8221/gogejisejalonademexuvujan.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/dpvbie84cu2bqlq1q2k2jks2ur/sakikaxuzujumugiza.pdfIn PDF document text
    • http://wsm.hk/images/files/21005537391.pdfIn PDF document text
    • https://used-machinetools.ro/app/webroot/files/userfiles/files/losalaw.pdfIn PDF document text
    • http://sobinco.cz/ckfinder/userfiles/files/92554558387.pdfIn PDF document text
    • http://forglass.sk/userfiles/file/bugadolorazobizedu.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/kogosul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=adobe+lightroom+mod+apk+2021PDF 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_off0000dc63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f47a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47A 11076 bytes
SHA-256: deee2150ddbbead671f8ee60bad7395a062b63f126efaca53d325877b534b3e8
font_02_sfnt_off00010de7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE7 18920 bytes
SHA-256: ebc9b0d0285795c7a304f9a881325cbdeefd9c6def7cfe28e085b0c209d7a6c8

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