Malicious PDF — malware analysis report

Static analysis result for SHA-256 3651bbd604c79ca7…

MALICIOUS

PDF

84.4 KB Created: 2021-08-19 01:36:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d1bf35a01d00e503b567764bf40708fd SHA-1: 82d06ac30e4d5d0d39f6ef20eeb66c29a146ee85 SHA-256: 3651bbd604c79ca7d604e5b7cd73e2a2f75a13bad0f17962c06d8dfb17db6a24
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as a phishing trojan and by ML classifiers as malicious. It contains numerous links, many pointing to compromised WordPress installations or IP addresses, suggesting a link farm designed to redirect users to malicious content. The presence of multiple external URIs and a link farm heuristic indicates a strong intent to direct users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be3ee8517d---bomakoposugiwuzalorolij.pdf PDF link annotation
    • https://jjpremiers.com/files/xatabuwuwajinojedevu.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/13160816169.pdfIn PDF document text
    • https://korzayithalat.com/spot/admin/fckeditor/userfiles/file/17968583175.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/07c3899c6fc3fe019444ba9e30de9351/wafuzamiduwijatar.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16071171b0fba8---lorirekenojabojomo.pdfIn PDF document text
    • http://dentherapia.hu/files/file/75274819870.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/2d4a50449786611c61c3ce8410c9bc5f/zinejukor.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/0ao0ho8jvqb6su02hf0hm8aths/5699783590.pdfIn PDF document text
    • https://advertisementnepal.com/ckfinder/userfiles/files/joniliju.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/6026ab660697d588ea8cc82eb4a3cc2d/45954940914.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/wukotoromawenamot.pdfIn PDF document text
    • https://orangcar.com/app/webroot/upload/files/mokaraminatoka.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7dc1328ff---gekolamekeludedolaxumenew.pdfIn PDF document text
    • http://chono.mn/uploads/userfiles/files/wiluxos.pdfIn PDF document text
    • http://hagelkonzept.com/userfiles/file/wilexemokaligava.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/4qauu61gro9qf6ou3c5v1ivhrp/wemopotosiw.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/071ec6b17ca28ea3ea8433541a4c00ae/72986968580.pdfIn PDF document text
    • http://rubivina.com/Images_upload/files/34589183777.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/8e9441e17025a7a4be28db6a1a50d1bd/sifojanupokobifajoxi.pdfIn PDF document text
    • https://study4student.com/cache/fck_files/file/kozevenavewabupuzavefe.pdfIn PDF document text
    • http://giustizianuova.it/userfiles/file/sowusebawer.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///bawitadonope.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=harry+potter+and+the+order+of+the+phoenix+pc+game+system+requirementsPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE166 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f97d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97D 11476 bytes
SHA-256: 060b4c3bd5257dd5098282c3e68784a57b8cbd1d27ee0f07b16c1725de3167bc
font_02_sfnt_off000113e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E5 17992 bytes
SHA-256: 4f89e96c986977f310eaed482fc4ad6ed85a4e3b4ec76f57ea1ebfc41b9853ab