Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e1635b67db1fe94…

MALICIOUS

PDF

90.5 KB Created: 2021-08-12 20:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ddad0b95166304cafab2e1c06eaa593c SHA-1: 443010515ef3c065b9846c5d12f27b83669937ed SHA-256: 3e1635b67db1fe946005385734bb46a23599283ae77fe2e47d1196c7818b7a5c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. It contains numerous external URLs, many of which point to compromised CMS upload directories or are part of a link farm, suggesting an intent to redirect users to malicious sites. The presence of these links and the overall detection profile indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://pixomot.ru/uplcv?utm_term=how+much+will+ps5+cost+in+india PDF link annotation
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/ed059266804433c486a920bda10d7f42/22457227560.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/a84f388e09ef09fcb88c58fd5696b90a/nerosivofaralozuwagob.pdfIn PDF document text
    • https://ferdavagnar.is/images/fck/file/nifalikamufo.pdfIn PDF document text
    • http://cosmosimpex.com/app/webroot/ckfinder/userfiles/files/32379055437.pdfIn PDF document text
    • http://sammyuriasproperties.com/userfiles/files/merijevowulane.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086bfc9d0a0d---sinamijabuxir.pdfIn PDF document text
    • http://simonide.org/userfiles/file/98930831949.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/hur7qjtb3emp48nu7hn6idbmuo/nenazomudenelepekeso.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/39661319520.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aafd62b35de---kozopej.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160946951587d6---90540413480.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607665964823b---72809598768.pdfIn PDF document text
    • http://hoaisonland.vn/upload/files/13525754283.pdfIn PDF document text
    • https://esz.jp/img/editor/files/kuwikowe.pdfIn PDF document text
    • https://akemi.ro/hirek/file/sumoruxiperodomikurufiv.pdfIn PDF document text
    • https://hitourkorea.com/FileData/ckfinder/files/20210615_077C1B9D8F5D3C2B.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/73osf384e73ukjvlebkm8phlkn/78095975895.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/v3ctrn0arh08g2qjlkk27ohtlr/98489828269.pdfIn PDF document text
    • http://klinok-saintp.ru/files/11089138833.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/qo3vjik00dnj0tnkn2sh4eglh3/86861900186.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/baretuledivetetakovubi.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/32456894488.pdfIn PDF document text
    • http://astro2sphere.com/admin/images/file/bidovalapakixezok.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/7bug9ifnv6stm122ac46gim8k7/62479275873.pdfIn PDF document text
    • http://www.sphotobooth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d48297b2cc---bukodalabasoridu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC19 10860 bytes
SHA-256: 48c891a8197f0bd303b677fb0084e7fdde306100711db81b5cb34f4c9faeccfd
font_01_sfnt_off0001150d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1150D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D1F 17496 bytes
SHA-256: d9a0e09dbbdb6cd513cd15aaf9a7cd46cec424c66033897c2ae4b42d99f0b748

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