Malicious PDF — malware analysis report

Static analysis result for SHA-256 df3f67543ddc405d…

MALICIOUS

PDF

80.9 KB Created: 2021-09-01 03:34:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 0f98005867d1bedbe4635dc0b40d9188 SHA-1: 98f7c40b21c95d918c41ae3ccc078bc49f69ffae SHA-256: df3f67543ddc405dbcff35551f259d129a526068e239be4f1e653fdadf7edc59
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to lead users to malicious content.

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://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/255c91c5551a80e016988082da255e13/4725657479.pdf In PDF document text
    • http://hermangroupcorp.com/clients/3/38/389628ddbd62db2fa1e4299ecdfc1861/File/sujojuvekev.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/jivufanaditozatitufitiju.pdfIn PDF document text
    • http://motivationandmomentum.net/ci/userfiles/files/wamakovojopaf.pdfIn PDF document text
    • http://www.kotolantopeni.cz/files/xexumug.pdfIn PDF document text
    • https://exihomes.com/userfiles/files/116502762.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb5f0cd968---48183183155.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/875e7a08860ff2ef72be8dcc4be32b8f/52602189973.pdfIn PDF document text
    • http://cuacuonanbinh.com/userfiles/file/65440350256.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/63485061094.pdfIn PDF document text
    • http://paglialonga.it/userfiles/files/12378045733.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/75888238305.pdfIn PDF document text
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/69613826567.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/files/lavufomovudegepanu.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077811c31919---rizej.pdfIn PDF document text
    • https://puppometalli.eu/file/zogotigotujatekafip.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/64715195.pdfIn PDF document text
    • http://fmafirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rinideb.pdfIn PDF document text
    • https://aaaxxion.info/images/file/nafezivapune.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/iu4ukrj2pt3rvu80sia1bmu1je/45934353093.pdfIn PDF document text
    • http://jedwines.com/cmsCart/upload/file/runedoketebebegenaf.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba584817d74---jusetogilog.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/161098e188bb96---jusamitisul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=4pic+word+answerPDF link annotation
    • http://cluster006.ovh.net/~greeters/be/ckfinder/userfiles/files/48138030372.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F7 17512 bytes
SHA-256: 42d58e9dd453f91eb5cfbfd61789f938e2be60a82b89a8691d7e6e2214cc889a
font_02_sfnt_off00011dc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC2 10432 bytes
SHA-256: bc5163c629e99b044b05f69c141ea7ee57afaa8a8445276624d6da1e32c94bf6

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