Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d0ad8333e75daea…

MALICIOUS

PDF

85.4 KB Created: 2021-07-01 14:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 94d0c09bc12be8fda45fac4d3384ffd1 SHA-1: 4de853693dc408a304caf422eb2fc8ac79de3041 SHA-256: 3d0ad8333e75daea2309fdb563958b126374601d164806ae293d8373b55258aa
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a callback phishing scam. It contains numerous links to disposable hosting sites, many of which point to PDF files, suggesting a link farm designed to host malicious content. The 'SE_CALLBACK_LURE' heuristic indicates the document likely prompts the user to call a phone number, a common tactic in tech support scams or fake billing schemes. No scripts were extracted, but the presence of numerous malicious URLs and the callback lure strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • 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) or Microsoft license-boilerplate 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://too.kg/wp-content/plugins/super-forms/uploads/php/files/a7a31e5302596f47407b02b75f69fcb3/doguwudumefurofatuxu.pdf In PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/41i4bcs79qlhsngmeok0mip3a2/20789809600.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/5c7292d34ed1256e8b9e4ff7719d1223/70184345185.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/23318841184.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/16084073941b88---4114638599.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202104/file/nowavipamuguwakarem.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/03pv4k0rktci93tilmaoon9n92/betabinagakunolapefuti.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/5cdace13e1ec09c637351097eaae8aa0/korobowosibetubo.pdfIn PDF document text
    • http://radissonhoteltraining.com/userfiles/file/61706209533.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160800583905ca---vufinijonuletorekireben.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/temizir.pdfIn PDF document text
    • https://willmarlakesarea2040.com/ckfinder/userfiles/files/31030288035.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/4472377aba684cca0bc0196c62909460/wifola.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609d48fdd9923---47529583984.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c09812a3d---gemaxepusilaxozanujiwom.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16073238fdacea---12330722588.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/99dcec99cb079d243440559b6eb270f5/86162132450.pdfIn PDF document text
    • http://zeguvietnam.com/uploads/ckfinder/files/milibevov.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607220f56f817---gijerekosineruluduw.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836934bdbf5---tixak.pdfIn PDF document text
    • http://nceed.kr/pds/userfiles/files/bowabebopomeluxaka.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/frf8fdub0h3j9vdmouop5a2u3n/zuduxawilopom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=exercise+5.5+class+12PDF 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

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_off0000ea51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA51 17320 bytes
SHA-256: f69181f54e183ef5305710412382c8ddef140ddc5632f2e1427d1f505e625014
font_01_sfnt_off0001176a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1176A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F81 10356 bytes
SHA-256: 13cd525b9fbb718de2f3dd17fb2a4562a960bd0f02c2bc0d9522dcd5704bec50

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