Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7e35b83749e944d…

MALICIOUS

PDF

84.9 KB Created: 2021-09-06 04:23:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5aa0ed7a8dc73403f43eb37aea571142 SHA-1: 5b4bede129a1c47acbe6f22fb86bda507c714ef4 SHA-256: a7e35b83749e944da3c793d076be5e36b2935e90f31839bf9d02670fc0471efa
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URIs pointing to compromised WordPress installations and disposable hosting, suggesting it functions as a link farm to distribute phishing content or further malware. The presence of external URIs and the nature of the links strongly suggest an attempt to redirect users to malicious sites, likely as part of a phishing campaign or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5408

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://oniceh.ru/uplcv?utm_term=stories+for+grade+4+pdf PDF link annotation
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb72e3a48b---pegar.pdfPDF link annotation
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083fdabba4ba---72123663871.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/93230504533.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/negujurexizada.pdfIn PDF document text
    • https://cubic.is/userfiles/file/polakawob.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/60743930308.pdfIn PDF document text
    • http://vote4dannybarry.com/clients/2/2f/2f5d4f67c16906f9b09010289963de11/File/28190768052.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078bea568505---27736655000.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16079a2be70003---difuxobef.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088c6c24cfc6---gekawebuzesojufaxob.pdfIn PDF document text
    • https://easypayindia.in/userfiles/file/37290434583.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7fe5abdec---tuxowugorafesif.pdfIn PDF document text
    • http://5m-tti.com/uploads/image/files/93692140396.pdfIn PDF document text
    • https://renault-service.com/userfiles/jepuguloz.pdfIn PDF document text
    • http://anticacarsulaeborzoi.eu/userfiles/files/39627089844.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/76ec73045i2o6nv6192ue82ffh/68356214399.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210728_B434FA8B0FDD1B0E.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a677ecce66b---finojaf.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160a272095746f---3153502393.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/37434513103.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/kasaduneguze.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10214 19188 bytes
SHA-256: 8cf9222328e99dc5afa3683b5e41ca94556c52fcfa1fa48ca4e853e7c2c5a5c9
font_01_sfnt_off00013325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13325 10676 bytes
SHA-256: 770a61e850f490392d75f4d6b49c881c97410f4e52b6f6a49e62cbe5296e7f9e

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