Malicious PDF — malware analysis report

Static analysis result for SHA-256 322c2d14ae4fef9e…

MALICIOUS

PDF

99.0 KB Created: 2021-09-13 16:48:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 02b31534fe5341c75062e753cbbbce9b SHA-1: 9800a12fc5f864a6d0c5483f6dfae42f602fed6a SHA-256: 322c2d14ae4fef9ed987fecfed8e1fe0270fb57ad340c30450a2904594af92db
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external sites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The critical finding is the 'SE_CLIPBOARD_COMMAND_LURE' heuristic, indicating the document instructs the user to paste content into a command-line interface, a common technique for executing malicious payloads. No scripts were extracted, but the overall structure and heuristics point to a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9862

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://allytemp.ru/uplcv?utm_term=descargar+app+inventor+2+para+android PDF link annotation
    • http://clinivetmadonnadirosa.eu/userfiles/files/bodenoxoli.pdfIn PDF document text
    • http://centrlita.ru/archive/image/file/paporuzikuvutujisibadil.pdfIn PDF document text
    • http://neo-net.info/giganet/files/file/kidaxofibarixemuvesuj.pdfIn PDF document text
    • http://rs-entp.com/upload/file/94194381793.pdfIn PDF document text
    • http://hodoan.net/userfiles/file/29979388276.pdfIn PDF document text
    • http://semihkerpiccilervesupersound.com/upload/file/76685796949.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/e090075acd222cc087f64da50c446fc6/38277127357.pdfIn PDF document text
    • https://peltonfell.org.uk/ckfinder/userfiles/files/puwakogisivamoneki.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/8503c926c2ecb7e08d2127375b5131aa/76664620660.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/48019729001.pdfIn PDF document text
    • http://princeverma.in/uploads/files/mefezexeteko.pdfIn PDF document text
    • http://goldenteriyaki.com/uploads/files/1444264731.pdfIn PDF document text
    • http://mecaniquekd.ca/upload/file/mirofizavuruwak.pdfIn PDF document text
    • http://cobe-ing.it/userfiles/files/93335715741.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/93856076660.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/e521b2bcfa7ca83e37034f7bfd555f55/62850157723.pdfIn PDF document text
    • http://boletin.alicantehosteleria.com/lib/ckfinder/userfiles/files/dijejijeluribuk.pdfIn PDF document text
    • http://werder-ritter.de/UserFiles/File/80497318383.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613313e516c42---11203076730.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161303de8159b0---48148921950.pdfIn PDF document text
    • http://xn----dtbsgbucafmmaf.xn--p1ai/servimages/editor/files/badekepojupepikemepam.pdfIn PDF document text
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001061f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1061F 10828 bytes
SHA-256: 311915b2056cfb04e83b64ec3efe99f6012cbfd2cc152d8e5f76bf04b97b8c2e
font_02_sfnt_off00011f19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F19 1868 bytes
SHA-256: b44e304f4199d162c520aa61e4565b27969aa952fa2ee1db3f4cf671ae1a9eb8
font_03_sfnt_off000127cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127CC 25868 bytes
SHA-256: 629ae801f360f921057cbba694dede4b2226337ac08ad0dfbd6c3072aec40797
font_04_sfnt_off0001680f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1680F 16148 bytes
SHA-256: 1c024217ce21bb66922f73502146d3c7616b47413e2e194c36dd680b30e64e78

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