Malicious PDF — malware analysis report

Static analysis result for SHA-256 801f3cc0c3aa41ce…

MALICIOUS

PDF

102.0 KB Created: 2021-06-29 19:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ff96a1cd32f3ea7d79355ea133078653 SHA-1: c993ddb2c8f81c9399e1a1a08d4bbfb37ed0dddd SHA-256: 801f3cc0c3aa41ce81772c11ff08bce85a8a2bc12dd01b80cf1b302610ee6487
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9803

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 http://ithaca1962.com/clients/41687/File/raxikagofude.pdf In PDF document text
    • http://agataklimowska.pl/userfiles/file/putagumasuzeboxen.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/c4bc744dc3e4f1dc2dbf5e2f0a157d1f/kewetevuwirigodob.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/2e90c18f28e47d2545f78706cf66887e/xixurikamegegare.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/livijofisowixa.pdfIn PDF document text
    • https://gangnampools.com/contents//files/95801402516.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/e7b0h5k8arvllk2r2l9h15d9c5/99600901679.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609fdc9fa5e8d---xudum.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/a4c2d26c081dd51e6ca0b3884e211f11/44243520725.pdfIn PDF document text
    • http://dharmapremipariwar.org/userfiles/file/48102950358.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/1ln7vss42g71iqg0h7lu96j615/9253780271.pdfIn PDF document text
    • http://learningkey.org/userfiles/gijuvoje.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e549cbb588---69554454169.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859aeb2f45b---17086133095.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c6f528362---80536413969.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4eee10724b---jitelosotuzurogiri.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16074c46059f0f---74253611331.pdfIn PDF document text
    • https://appchecar.com/ckfinder/userfiles/files/geralezubixadex.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/42a7df8b90c92cb3bfa410c0abece6cc/28634314745.pdfIn PDF document text
    • https://espaciocultivarte.com/ckfinder/userfiles/files/wifatemuvalesevupuwinuru.pdfIn PDF document text
    • https://mariapolis.net/ckfinder/userfiles/files/roxojijidujowinuwowi.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077854b5f8ce---juzejozetalilamu.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf3db90548---dukopalalipufago.pdfIn PDF document text
    • http://snotlicker.com/clients/10243/File/dareboserijoreg.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160a09486ba5eb---7349178339.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/de35c8008ae8dd08857fc00967756fc1/xetepezusalaberudabujomok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=best+novels+to+read+to+improve+english+pdf+free+downloadPDF 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_off00012a65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A65 11152 bytes
SHA-256: 6706d40437782d3b9bf999b1a8225011d359f27d64c5b35636cfce158ec87b97
font_01_sfnt_off00014421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14421 17472 bytes
SHA-256: 9e870c1d2e1873f73a31f793bdbd5b01a0d6456cd4b4533ab1e3f11a6a0dec9f
font_02_sfnt_off000171e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1