Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcff17896d471a49…

MALICIOUS

PDF

102.5 KB Created: 2021-06-27 19:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 87c368cd48f1bc13b2673eb4df55e52e SHA-1: 9ecb41dc3633567bbea3e6211fd8bea20d6d61f3 SHA-256: bcff17896d471a49e1456c47a36aaefaf6f4bfbb5be7157b24d0d05f4991fff0
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting sites. The primary purpose appears to be directing users to malicious websites, likely for phishing or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

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://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/e35529c0474737a280b845e356aaa914/mifoxufomolisitisazevete.pdf In PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/81400533eca7b71bdaf16b4b21d0a1a3/godinezegegazebifaku.pdfIn PDF document text
    • https://mimpishio2bet.com/contents//files/72112636482.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/98i5rj4a5r2h0rss64qvara0d3/lamux.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/78248159360.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa163642948---loremiv.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/251cb298ca3287115739fdbedf283c05/kawukagekutonotasomimowun.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb23d5dc07---67886151979.pdfIn PDF document text
    • http://jakpaisanestate.com/images/upload/files/xuzedunukimax.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16092fc9cb06cc---54055560610.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711d5a4b3be---48891799327.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c78343e3a73---gilatolizegenuxi.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/agkt1bbkvpbt58ff3uo7gcsqk1/26408921162.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021052103171273499.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16072ad5b4dcba---76549497062.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607d494f90f01---wotumefejadopaleziruwas.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca765eb3da---xomasonojidak.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/94df749eb6be3d124aad022d7a7f4bd3/72139860561.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987838a30e9---rusevumasadojiz.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/76339685616.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/8b6d143cc2e5ac1fa3e2061653cddca6/walagimiruwepixobogane.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/vidinuxovoga.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/lde64bl7qgjlskkdu6i8usaml0/sumiwupefega.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=pals+written+exam+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_off00012070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12070 18484 bytes
SHA-256: f35dce0326cebac7fddc14d94dca3516a9c551edec79d732e445d3eec84bdd1a
font_01_sfnt_off00015181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15181 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16998 10340 bytes
SHA-256: c8b5020751eb5ce357f771ceb9487882b7154cfcb6a81cc379e218dcbe46c2e0
font_03_sfnt_off000180f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180F1 2708 bytes
SHA-256: 1d9055d1fbace049839321de4829a5f679dc3573314156f195e5d864393fb169

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