Malicious PDF — malware analysis report

Static analysis result for SHA-256 06c4f72c463a1620…

MALICIOUS

PDF

84.1 KB Created: 2021-09-19 22:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 31679b8f78999bd447f8a69e439683dd SHA-1: f753851186108b51c50fd3e9cb917aee9dd10c00 SHA-256: 06c4f72c463a16208cbc5589606cd7613a4d849efe024c79965f193de5c369aa
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. It contains numerous links to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites or download further payloads. The presence of embedded URLs and the callback lure heuristic further support its use in phishing or social engineering attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://pixomot.ru/uplcv?utm_term=daring+greatly+book+pdf PDF link annotation
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614338315248f---gakijab.pdfIn PDF document text
    • http://poltinka.ru/userfiles/file/bevazadojuxabudexalewiz.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613e6fa7583b1---zuzirafebi.pdfIn PDF document text
    • https://franchiseharbor.com/files/files/909658536.pdfIn PDF document text
    • https://nikoljski.com/ckfinder/userfiles/files/92640591056.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132de513bfd8---19519914507.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16138d55eca93f---xaxikinavamiredi.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16142c8d30df62---54020065104.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/16146a44a5dac4---mesifodebixapajepavowi.pdfIn PDF document text
    • http://groupementpecheduloir.com/ckfinder/userfiles/files/nojijijukidosojabode.pdfIn PDF document text
    • http://gpsputhuppally.com/userfiles/file/fazezubesezabu.pdfIn PDF document text
    • https://coolinterier.sk/upload/files/jofitupugewat.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/161471ac22c421---57239504579.pdfIn PDF document text
    • https://crc.creativechange.net/ckfinder/userfiles/files/33498211256.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/hdjembaeagdj3srqggug6cvm89/8485728096.pdfIn PDF document text
    • http://kolaykanal.com/userfiles/files/32927301534.pdfIn PDF document text
    • http://fsgpj.com/upfolder/e/files/20210907033305.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/70793319983.pdfIn PDF document text
    • https://bruceleevideos.org/images/file/10244119150.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613910e976fe5---34996833635.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130b365a378e---tiwakerune.pdfIn PDF document text
    • http://woodbridgeabw.com/uploads/files/lixojawefikonapevesazuz.pdfIn PDF document text
    • http://tungalag.mn/userfiles/files/magapobewavowedor.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/file/nosalibixegojeben.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE261 10852 bytes
SHA-256: 5e722bbaa853ee3343137d47a2f596971490c1907033c0a5befd5b05a2b2e284
font_01_sfnt_off0000fb1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1E 18348 bytes
SHA-256: 13e9e96232f89f491ce5249b01d90f708be4bcaddcf4da778b74074417a8e7f7
font_02_sfnt_off00012ac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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