Malicious PDF — malware analysis report

Static analysis result for SHA-256 acec33e4aaa34120…

MALICIOUS

PDF

89.9 KB Created: 2021-08-15 15:47:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 72d75d851aa8ae266a3cdb9fbdff6d19 SHA-1: 142c8f6a108439d67039c61781d4520fb75eec1c SHA-256: acec33e4aaa341205992dbcec4f3b09893ded41651ed1854b50c4b2452517089
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. The presence of multiple external URIs and the overall structure indicate a lure to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://40parables.com/wp-content/plugins/super-forms/uploads/php/files/e878b2add200fbfa5ec8978a4720dcf8/gexopobowupax.pdf In PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608511aae3329---10604870708.pdfIn PDF document text
    • http://cloverpark1960.com/clients/1/17/17c242f0968dc4bce059666b43fbd075/File/26307425482.pdfIn PDF document text
    • http://studiorinaldibedin.eu/userfiles/files/38400587731.pdfIn PDF document text
    • https://a-1commercialkitchenservices.com/ckfinder/userfiles/files/34917544699.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/25798729442.pdfIn PDF document text
    • http://fittbike.hu/files/file/77614302008.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/c77f62db8bcbe68b7e64d92c2623bb35/55818583452.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/1671628045097dfbf231539dedf9507e/dixutibipa.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/97807325933.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16085205cb2eb1---52584966351.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160abe95aa7cf5---53343595361.pdfIn PDF document text
    • https://506hlapeta.com/files/file/magisidazuti.pdfIn PDF document text
    • http://solarissoft.com/img/userfiles/files/39027047659.pdfIn PDF document text
    • https://valergences.fr/userfiles/file/rerebosusiwuworavef.pdfIn PDF document text
    • http://trivio.it/userfiles/files/95289967860.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/3c47a05ec0da646f8749a00ad6e80afd/53466229368.pdfIn PDF document text
    • https://vipbeachhouse.com/uploads/editor/file/xibifumotibegabidodobe.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/tarig.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160e22f6c0d9f3---63295516536.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610cc04eed0e5---pukeborix.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/sdcc5gfb3p4q5k334gjkdib5m2/59422479458.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/1097f012c0c0fb2a5227978a7288d22f/pofunebisuwowofovotekago.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=telecharger+music+mp3+gratuit+maroc+cha3biPDF 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_off0000d4bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ecd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD3 11092 bytes
SHA-256: a58b7bc29a18bf148f892f2016902d02678cb7b4a71831f252cf2e5b30781868
font_02_sfnt_off00010686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10686 17512 bytes
SHA-256: 63fae6bd9d1f59c852d2d73f4c0e3ea0085e4da66123a283e00739fa4aa2c373
font_03_sfnt_off00013329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13329 21868 bytes
SHA-256: c8bcaede3ce9d290a0f51eeecdb2c9aae4d2218eb68021c172e0b4976b75d62b

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