Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c020d93248c4afa…

MALICIOUS

PDF

82.9 KB Created: 2021-07-16 18:45:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5834b76d5b0b3c0d218b62307583f071 SHA-1: 815864049da187eb8677c185e9039462cd9cb68d SHA-256: 4c020d93248c4afa10584d7bbc4fc71b2d3871fc4449c89d7d2444e63e28c01f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ML classifiers and ClamAV, and heuristics indicate it is an advance-fee scam lure. The document contains numerous links to potentially compromised WordPress sites, suggesting a tactic to host malicious content or redirect users. While no scripts were explicitly extracted, the PDF format can embed JavaScript, which is often used in such scams to initiate further malicious actions or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/4k4kifp1o7fhmf8ovorgqg6d6k/wikilujelik.pdf In PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/acd5ehtace9pc2keemj2ichgth/pisusubafijetal.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/6285022ed0d47c1e05e05bc0e7bd0f5c/simafofowo.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160dba95b5d940---45176244573.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/07afeaec5c05445835d1457e0270ca92/80477848238.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bdfbe29134---fafefamev.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/76789768957.pdfIn PDF document text
    • http://abwingsbuffalo.com/uploads/files/mofefag.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/zexakewos.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/ubgivrmm73gfc5ani1bdpscaa5/bogamufok.pdfIn PDF document text
    • http://jaika.in/images/documents/files/litugofap.pdfIn PDF document text
    • https://2acontractor.it/images/file/64379062233.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/7affd471675f779599a5566d6f21cd42/74377297809.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160965fa14328a---bebanonodefojivodupasow.pdfIn PDF document text
    • http://capitalclassof1970.com/clients/e/e7/e78cae7b17622b0161c193cbd63f4fd0/File/nivobilenevolijitenataxa.pdfIn PDF document text
    • http://avonsteel.com/UserFiles/file/jijiduvinubugibekiru.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/gububogaluruzedote.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070d5e31a80d---13540644365.pdfIn PDF document text
    • http://krugernilssonreunion.org/clients/c/c3/c301050bdfa85653d7453904791897ac/File/86514535486.pdfIn PDF document text
    • http://danielbushreunion.com/clients/41596/File/4981521139.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e1a8e22d1---22093064130.pdfIn PDF document text
    • http://splogservice.ru/content/file/zalipuz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=bcpao+property+searchPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/4045d1d6411de3ea83e87d11283d9de7/31313289596.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_off0000e377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE377 16668 bytes
SHA-256: 3c07cd83945b123cb8931b49969154c57cf8bd9bdec2e57f85cfc8bbd89e732c
font_01_sfnt_off00010ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED1 10396 bytes
SHA-256: f248aa2d2d58cadd1c115205da02ce1f5bf4cc7b8da5986118b1832dbc713cd3
font_02_sfnt_off00012695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12695 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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