Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0e0f834a60747c1…

MALICIOUS

PDF

80.5 KB Created: 2021-09-05 07:49:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2749418305313220a99e2d4df45c579f SHA-1: 8382032c3494a1da45a405b0282c3520ce5f9fbf SHA-256: f0e0f834a60747c1275f356266469a1386df62b51e9523890901d1cac58788f5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting domains, likely intended to lure users to malicious sites. The presence of external URI heuristics and link farm indicators strongly suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f7bbcacad---23629953273.pdf In PDF document text
    • http://meble-tk.pl/userfiles/file/3170300664.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/xixojukixefi.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/fiwipewalaniwuburow.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160ade85fcfea3---jopaj.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160879ff044742---pibakiluzivep.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/suvegolemugevevutav.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c73ef382f7---23939772089.pdfIn PDF document text
    • http://msinziniering.com/userfiles/file/suluzasoxavezelo.pdfIn PDF document text
    • http://circolosilverblufitnessclub.eu/userfiles/files/jojin.pdfIn PDF document text
    • https://dialogueinpraxis.net/files/docs/72283150534.pdfIn PDF document text
    • http://orhs86reunion.com/clients/6/67/6744625166a0df26c7abb40948833271/File/siwikukojoxipatudeku.pdfIn PDF document text
    • https://hifi-markt.eu/kunden/kronhardt/ckfinder/userfiles/files/93936150232.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/ronovebukofelimofad.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/bitowelixiregizaw.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/d6f57b3370126597ce687ca9223cff30/48820492497.pdfIn PDF document text
    • http://flemingdecal.com/uploads/assets/file/93471674093.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/8b1c6e856d83d30ad13c562330910586/dawosupazinelo.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee44c145511---nodapinibota.pdfIn PDF document text
    • https://www.poolsrus.com.au/application/third_party/ckfinder/userfiles/files/16286728798.pdfIn PDF document text
    • https://sunnyrosesschool.com/userfiles/file/90641428389.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b049155366d---49758325120.pdfIn PDF document text
    • http://abbuffalowings.com/uploads/files/79616425047.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=types+of+energy+quiz+pdfPDF 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_off0000d7a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A4 17404 bytes
SHA-256: cc6ba9679202eda3ae351e93d698c2c356a478028a806a81e8c6cc2f96937290
font_01_sfnt_off000103ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C05 10748 bytes
SHA-256: f8faee4f33f26eb69fe2305944aed7bcc1c9141bf0079b1a7e0aed1ae3b58385

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