Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f697c766bc4eaed…

MALICIOUS

PDF

193.2 KB Created: 2021-06-30 04:33:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 52cfd3f637170b0dbd08b2b02f45ff17 SHA-1: 622732232de5f253656e89d09cbc4f1256dc6a1c SHA-256: 7f697c766bc4eaedd99a26d3880fc1c2826c58288c5f3e5d8377e086204eb5be
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

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://ketchas.ru/uplcv?utm_term=psychopathic+traits+meaning
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070f1ba3888c---39400699811.pdf
    • https://jbdclothiers.net/emailer/userfiles/file/47900603966.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cfc8538ca03---47095458010.pdf
    • http://vds-construct.pl/userfiles/file/28005374904.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071b3a2c540d---61885845668.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d425c716926---88332640513.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8426d01fc2---95174460505.pdf
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/flsk7vc9phdlgslg56p8amc07r/bixokavanutivosukusugogut.pdf
    • https://fishboat.hr/files/74819012733.pdf
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/0344j47c1nh92usaugngko3rmc/xifopi.pdf
    • https://festival.bg/fckeditorfiles/file/zatofipefagofimi.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/4996df5849e0c2d3391dafac99864669/27485823359.pdf
    • http://sungsam.net/userData/board/file/53845973102.pdf
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/ab24b24868f7661ad1b96ca358c9ff0c/67188813554.pdf
    • https://ascinfratech.com/clientprojects/trading/file/61987988532.pdf
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/67483607772.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/2f973cf157765ce1b3f942e9a8ff5038/xanuvagifarizapaliworasa.pdf
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a11bbfc7662---38386009370.pdf
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/f438da00735fa85e73b976481d3edd45/89787969194.pdf
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/lokl4fk0oqc693g43hfbjr9pe7/10490585289.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160800beacf5d3---14253060953.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160b08cf21d34f---xuzul.pdf
    • http://iphysiology.ru/upload/tazimis.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078fd8c991e2---39099374289.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00028dee.bin
81ae9207d4018b202c23af2f6cec6b45d3650ff3c873f02904be16937fad1528
pdf-font-stream PDF embedded font (sfnt) at offset 0x28DEE 21964 bytes
font_01_sfnt_off0002c634.bin
5f7de937645e3e88d207635d6801738de641794ec79772685e84d7f6d6bd9921
pdf-font-stream PDF embedded font (sfnt) at offset 0x2C634 10888 bytes
font_02_sfnt_off0002df52.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2DF52 16792 bytes