Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c62c0af0f188aa3…

MALICIOUS

PDF

93.1 KB Created: 2021-08-10 04:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 38770c8d2a3a2079c1eb03d082c38d81 SHA-1: 836a63b68621f2003b7f704d9f8e2c6cef4d69c6 SHA-256: 1c62c0af0f188aa30c33a8dd271844f3817f4acfa73ef095f818bc3a47115170
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external PDFs hosted on compromised CMS platforms and disposable hosting, suggesting a link farm designed to trick users into downloading further malicious content. The presence of a 'download button' heuristic further supports this phishing-like lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 8

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gamaconsultores.cl/upload/file/91569147048.pdf In PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/5ac96pl3m6ppsko760rt324ogh/talorepikunowedurinajof.pdfIn PDF document text
    • http://dges.in/userfiles/file/42576924915.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/218f2506880031ac81206f1e3edf1ccb/61521558951.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/4b33a7174b108dada3c2b7bec6014123/32981981528.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bb6583b618de20505d6545291ff8a22f/dejovipovatujor.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/57544a7b5b867beab45900b0ea6c4838/63445837555.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/29081a0424830aa9b36c86a8f981d6a2/56362351927.pdfIn PDF document text
    • http://josephlillianmorrisfamily.com/clients/59960/File/lulinaxak.pdfIn PDF document text
    • http://ecandrychow.pl/Image/files/13838675624.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021071303202773499.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160a8efa9ddcf8---17399473496.pdfPDF link annotation
    • http://accessiblevehicleservices.com/userfiles/file/lixupexabu.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a91fe9ab992---revenasasenap.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b40c84ae40---pevevuforezudejojasiwam.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/murob.pdfIn PDF document text
    • http://hoggard1975.com/clients/a/a4/a43fc1111b7ad4318f8b553feb79a890/File/95431077888.pdfIn PDF document text
    • http://thegioichuyendong.info/app/webroot/upload/files/83574215818.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/9880d6a4efff5457f3f0410161058a50/76390368670.pdfIn PDF document text
    • https://cutandcolorparrucchieri.it/file/sekuwufenufod.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/ogtsqoqfsr9v5fvdjour4aqvv7/kusokoxirazovefawog.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c559e0f0167---tegazufoxekofomu.pdfIn PDF document text
    • https://areicon.com/images/file/991049883.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=fast+and+furious+part+1+full+movie+download+in+hindi+480pPDF 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_off0000fcc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC5 11452 bytes
SHA-256: 3a4d28e93587bc05c2407edf748877b43422423c60ff0f96237f408b43450b58
font_01_sfnt_off000117bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FCF 17472 bytes
SHA-256: 7c772d35ffffd476660992533202d212ab796592c71806d231c276cae86aa34c
font_03_sfnt_off00015daa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DAA 1284 bytes
SHA-256: 3f2eb68e56e0cc9b24f861ad510cb196f24dbc520975aefba06cb0b93c7ac786