Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a2cc25dac0cda4c…

MALICIOUS

PDF

93.4 KB Created: 2021-07-01 23:46:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1c4cf620e7833161bbbfef052eee654e SHA-1: 7b427a22a694febdd860dea222fd499733b6ec7a SHA-256: 5a2cc25dac0cda4c978073d59ffbb35df523eae341df6ac9b70071b21fef657b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS uploads, 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 link farm behavior are indicative of malicious redirection techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607303fa82e80---sisogekukaredarozezix.pdf In PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c17dfbc6637---69576589478.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/13440672807.pdfIn PDF document text
    • http://homenet-spb.ru/userfiles/file/pafasinofitiloporoverofu.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents//files/wufasosate.pdfIn PDF document text
    • https://advik.net/userfiles/file/62575119207.pdfIn PDF document text
    • http://ccspevents.com/clients/24998/File/dilokejirudinikefutaviku.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16086cc39c517c---75481261992.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/4141ede8086df06afc8dedc9aecd504f/ziwul.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088fa7b6e34a---96776653399.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/jbphvdncaihegvirp5r94vs2lq/nesotafefa.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084015901385---85072589006.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2296c73619---31834363506.pdfIn PDF document text
    • http://farmaciafici.com/userfiles/files/xitesanuderazofegod.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a8505a36287---8752251030.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ae1229977---46807583409.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/b3d437060ba3a1617254fb20f76515a8/vexisuxi.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/vodozorubukifo.pdfIn PDF document text
    • http://indecomavo.pl/inc/89990547227.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/4rgg7gtnjefhq1t3e9ko1h5bv3/82372575349.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/fagekuvomabom.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/11ad423675aea09ed2f0ba742922d6f5/gudoguf.pdfIn PDF document text
    • http://maybomchuachay24h.com/Images_upload/files/lujajemaxagowosoluvem.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/sisinufolasakezosobow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=microeconomics+chapter+4+answersPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC08 17960 bytes
SHA-256: 0a893b502413715858b02796ee5996f4ba2eca4bba748f742399873a6040875a
font_01_sfnt_off000107af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AF 18036 bytes
SHA-256: efa95d9414129c5c613b094a217f797595425ea1f5602d5ee1dcc6ccbbf5b3db
font_02_sfnt_off00013708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13708 10748 bytes
SHA-256: 9399c7377c1a2f77c6f8d960505282fc1ec207f71425792deaa1a2396c457a54
font_03_sfnt_off00014fb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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