Malicious PDF — malware analysis report

Static analysis result for SHA-256 5033b64bdb7f167c…

MALICIOUS

PDF

103.3 KB Created: 2021-08-18 08:33:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: a1120b3a0c58e440831ed8b8e89e018e SHA-1: 1cb414de8c8a6f081e545c15a236573c63bbc08c SHA-256: 5033b64bdb7f167cd4fb9408b861708fa5701cebf407150efab11686a5184c7f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm that points to multiple compromised CMS upload locations and disposable hosting sites, suggesting an attempt to distribute further malicious content or phish users. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://agendatourvietnam.com/hinhanh/file/84122809271.pdf In PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4f75b31eb---45547467074.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160acec9114ec8---tubogop.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160827cdb4ffa6---16625171752.pdfIn PDF document text
    • http://grupposcorcia.it/userfiles/files/taviketaniwuxep.pdfIn PDF document text
    • https://egyptsuntours.com/userfiles/files/34178591452.pdfIn PDF document text
    • https://bangiyaparishadtoronto.ca/bpt/editor/uploadfiles/18881055095.pdfIn PDF document text
    • http://tipiland.net/upload/file/95768019249.pdfIn PDF document text
    • http://recrute.fr/files/files/wovamuxibewulivavojeso.pdfIn PDF document text
    • http://sxcec.org/userfiles/file/lozolomegaporilipadolotob.pdfIn PDF document text
    • http://rcp-ranstadt.us/files/jonafarozifasadepuz.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/tozivumebikupe.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/wadanapenutiba.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b7c83bab3---rivimikefog.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/nulajetubasesofulog.pdfIn PDF document text
    • http://ristorantebiscione.com/userfiles/files/nevigopejol.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/oc10untg8ebl945e18a1knjfs5/kanonigimuvo.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/a87l7sgk77hd242dd6kqu04482/rakenotomupidezex.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/5opqb8na62cnnrefmgema5p9a7/96759864618.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/0ffc9a6b3a4c7d529e60e6e49533d4f9/34976948737.pdfIn PDF document text
    • http://kanstm.com/ckupload/files/pukugepatowipekakir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=barcelona+vs+real+madrid+2020+full+matchPDF 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_off00012cce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CCE 11200 bytes
SHA-256: df8db48666da8e489a2300cd1585c43c7a040a046974fd7893d6b7b097fc73c8
font_01_sfnt_off000146ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146EA 19724 bytes
SHA-256: d6fe5eb14191417b2b45c5c0f16fd033f4e7f2d97728d6a9f230bf1154469fa1
font_02_sfnt_off0001774a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1774A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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