Malicious PDF — malware analysis report

Static analysis result for SHA-256 1afa17cbe7041fb2…

MALICIOUS

PDF

78.8 KB Created: 2021-08-04 21:07:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ef4331709f89c455b2f66da00c2b16ec SHA-1: 31b6f3582bfede298ba9ca49ca0c70906478bc39 SHA-256: 1afa17cbe7041fb247e0bfbe7f57d833b9fdfbd37831fb2ff96275253b558d7c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised websites, suggesting an attempt to redirect users to malicious content. The presence of numerous unknown URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://iamtimeshare.com/userfiles/file/lezusawijadobuzol.pdf In PDF document text
    • http://abpaluso.com/upload/file/baviremigel.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/pudupifategeledadej.pdfIn PDF document text
    • https://phuquiland.com/upload/files/91222563491.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6c21addef---28789732888.pdfIn PDF document text
    • http://lawyermo.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dinimaxonejojujidovedipa.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/49ca6819a6fec940a34810a2f3d6608f/20279157328.pdfIn PDF document text
    • https://mgs-on-track.com/uploads/misc/files/27538950469.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607edce77b797---panusavolimikizutura.pdfIn PDF document text
    • http://kartinatv.org/uploads/files/55965636064.pdfIn PDF document text
    • http://shs1977reunion.com/clients/41590/File/guvibenivupipom.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/cd5fcf86f4ded29d4e7dc848f0e92e53/fidabivugirowivibisotozon.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/1fa541a2a28c09043c4079dd8ea8481a/42818761744.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ea527ae66---jafegupufefed.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160adc4f0374dd---siguvinaxazifilosiw.pdfIn PDF document text
    • https://nullemont.fr/nullemont/ckfinder/userfiles/files/91291472591.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/xutudedifituxo.pdfIn PDF document text
    • https://citytrafik.nu/images/file/16590189401.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160a940a00cc43---63648392816.pdfIn PDF document text
    • http://fruhmann-elektrotechnik.at/tawudipadiwinazafigogen.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/kegipux.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/1c086f1ede775d75d858a2737e21542d/dizazuxobusipe.pdfIn PDF document text
    • http://uticahighclassof78.com/clients/8/89/89c70e22fe5ad1405280b455f64975d7/File/wodivebeleruxojiluvixusus.pdfIn PDF document text
    • http://mhinflatable.com/upload/file/zekisobitatixaxole.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/81774941712.pdfIn PDF document text
    • http://dallassymphonyleague.com/clients/1/14/14bb4a025281f1a32078cb68571f7cf3/File/fifilupirowafa.pdfIn PDF document text
    • https://ystechpro.com/nbloom/fckuploads/file/18629045683.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=volvo+penta+service+manualPDF 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_off0000d1c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C8 16912 bytes
SHA-256: 9cedddc12a77c7542604965597d27ff7c3cc7b92fbf3cc05d7cb382f3c702cc9
font_01_sfnt_off0000fd07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001151e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1151E 10668 bytes
SHA-256: 08784632c970367fd6a66e390685c834b9b264d12a9342a1a148cdb41174371f