Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4caabbe2105372d…

MALICIOUS

PDF

90.2 KB Created: 2021-07-16 03:03:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f84c50697b2a159d153e0ad564350525 SHA-1: 8abd5cbf5e290de72700bd9d6d74dd264e9c822c SHA-256: d4caabbe2105372d56752c1e9eaf30a5dc48e3ba9ff2a3b933a5e2a0be9dc167
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The document contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the presence of external links and the overall detection profile strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://niezapominajkowo.eu/userfiles/file/70764603666.pdf In PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf1f0ea0fc---6593786713.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/1tghv36mhhkl19t89tqu4rr22j/potevabegelis.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bc73af14b3a---57663532325.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/22f1943f9279a03836789df9f4cd9c1d/peseginurimutulagabudot.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16086b876dafb3---zulafopokorefoletone.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/941q38hfl6b2k073ecv4gghu8e/32674915765.pdfIn PDF document text
    • http://skpizzasubs.com/uploads/files/riwutikepabezogug.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/01686f9c13694d3bcb677b59d828b055/lomegulate.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/mifobedafekusumuxofu.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/9f7217861175973702a4d58568cff4ca/misuze.pdfIn PDF document text
    • https://hattoco.vn/images/ckeditor/files/11664979760.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/a2298458df4c87b7b83ec84c14cb687a/78547758413.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/d9311ef4caf6192f6226af30b6c877ae/lafukezexuzizapogig.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/jezulitimefuwegebovi.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/nowivuzez.pdfIn PDF document text
    • http://anquocrealty.com/uploads/image/files/xodoxuvutokum.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8abf2f225---vobababelipitexogobaf.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16076db2f7cd34---zabadibanirutowat.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792113ebca9---suvaradugawifixanu.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160730ddf4df21---xumotoj.pdfIn PDF document text
    • http://mbcasc.net/imgs/file/sigovusunerikotetagafem.pdfIn PDF document text
    • http://xn--rssx31a7tec6p.com/upload/userfiles/files/20210626145113.pdfIn PDF document text
    • http://lidata.eu/files/fufoxog.pdfIn PDF document text
    • http://vincentpopetutoring.com/clients/d/dd/dd6b7bcf94cac99d3bed97cf8166637b/File/lalevowodutabosananuda.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=proof+of+congruence+of+trianglesPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE709 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF20 10612 bytes
SHA-256: 63a5fcae607e1823058b97930e30a0d807df086ad74eba6bfcb8128f10bbb0e2
font_02_sfnt_off0001178d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1178D 17300 bytes
SHA-256: aae1b139c6a53a78a5858b613a02c2c50022e299a2b555ef51f5eaf07794dc4f
font_03_sfnt_off00014509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14509 16168 bytes
SHA-256: 34837fdfed7e6dc9e8c1ebc45eabef1064a6e89f8cd536305124148a4af1fb29

Open this report in the interactive analyzer, or submit your own file for analysis.