Malicious PDF — malware analysis report

Static analysis result for SHA-256 d74f159216652446…

MALICIOUS

PDF

69.1 KB Created: 2021-09-21 15:21:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b713c74b659cd2bda9a4fec6cf4b18fd SHA-1: 1f48d0c57fb71dc42f885cb7936ce8407eb8c69d SHA-256: d74f1592166524461c0aa90665740de1650256a973c84bd724b80d9ef64f6df0
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, typical of phishing campaigns, containing numerous links to external sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or phishing pages. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lead users to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://giritrademark.com/content_files/files/90579484315.pdf In PDF document text
    • http://gameometria.com/assets/ckfinder/core/connector/php/uploads/files/13042564242.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/15372068415.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/94916737766.pdfIn PDF document text
    • https://basisnomor.com/contents/files/31214974308.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/ckfinder/userfiles/files/52407538240.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/65af04e2527fb491ad9ff0ef9af80304/rovotina.pdfIn PDF document text
    • http://lpsa.cz/userfiles/file/lejeb.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/xilitorizonirufulagimapiw.pdfIn PDF document text
    • http://th-hl.com///upload/files/43317436390.pdfIn PDF document text
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/23549477303.pdfIn PDF document text
    • https://nitdgp.ac.in/uploads/userfiles/files/lobopegir.pdfIn PDF document text
    • https://www.scmsgroup.org/ckfinder/userfiles/files/10476338029.pdfIn PDF document text
    • https://brawlcall.com/ckfinder/userfiles/files/44349634719.pdfIn PDF document text
    • https://n-v-v.dk/userfiles/file/72418429687.pdfIn PDF document text
    • https://mcdelandes.ca/uploads/file/pituxofadejixo.pdfIn PDF document text
    • http://imobiliariaimperio.com/files/files/87220988968.pdfIn PDF document text
    • https://masihpt1.com/contents/files/20288552895.pdfIn PDF document text
    • https://www.moxiclear.com.au/application/third_party/ckfinder/userfiles/files/34341035174.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/53601443246.pdfIn PDF document text
    • http://primethailand.com/ckfinder/userfiles/files/lasezifofum.pdfIn PDF document text
    • http://citra.cl/userfiles/file/farezudanolinonubupi.pdfIn PDF document text
    • http://jor-agric-aqua.com/user_img/files/68987897498.pdfIn PDF document text
    • http://suachuamaydemtien.biz/userfiles/file/78446111849.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=iphone+ringtones+for+android+free+downloadPDF 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_off0000b232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB232 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA44 14108 bytes
SHA-256: 5f9ae5e5f7c138342d0ade7d755b7421b1d22fffbedf3accf3f2c07bdd4f7859
font_02_sfnt_off0000ed55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED55 10816 bytes
SHA-256: 8e4cdef7cacb5e4a3132a5338ebc5cd8e5af1098f3ab0266bf1368796e58660e