Malicious PDF — malware analysis report

Static analysis result for SHA-256 884ed0de524aad05…

MALICIOUS

PDF

83.6 KB Created: 2021-09-12 13:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c2908287dbee38e76447b58629bf8723 SHA-1: a0a38735ba0e2608f0c0856fb17592550716b948 SHA-256: 884ed0de524aad053fb9d58565bcb5776626b463d376e807bea1d33a370cc10f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The presence of external URIs and the overall structure indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a80c5a490d---gukoxi.pdf In PDF document text
    • http://yanarfabrics.com/firma/files/96106119865.pdfIn PDF document text
    • https://www.truck-transport.com/ckfinder/userfiles/files/vibepulodaxufinurawukoxaf.pdfIn PDF document text
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/fodedawekevelita.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/19125305154.pdfIn PDF document text
    • http://pegastelco.com/pictures/files/43401360960.pdfIn PDF document text
    • http://wonderpanel.com/app/webroot/img/file/soliwoduxezasika.pdfIn PDF document text
    • http://apnschool.in/singhania/downloads/file/27941298181.pdfIn PDF document text
    • https://commonlawhouse.in/userfiles/file/77645969499.pdfIn PDF document text
    • http://precisao.org/files/files/862529292.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613b3b9ae45a0---21252111079.pdfIn PDF document text
    • https://unitedfightalliance.jordanadams.com/ckfinder/userfiles/files/94571930372.pdfIn PDF document text
    • http://namlinhchivietnam.net/userfiles/image/file/5741698030.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/10236400510.pdfIn PDF document text
    • http://studioriboldi.eu/userfiles/files/gegajeparofapuke.pdfIn PDF document text
    • http://findusafranchise.com/files/files/13052445977.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/99325545971.pdfIn PDF document text
    • http://zentrumok.com/userfile/files/diziserifilukoluv.pdfIn PDF document text
    • http://scuderieverdina.it/scuderia/userfiles/file/xumazudimubumupomevejofe.pdfIn PDF document text
    • https://thefencedocumentary.ca/adminfiles/file/jifoxijanugepura.pdfIn PDF document text
    • http://sintellect.ru/Repository/file/zenafipatuvapujiloxapapaj.pdfIn PDF document text
    • http://smartraoptics.com/fck_filemanager_upload/file/tazepitirixebo.pdfIn PDF document text
    • http://tzsunup.com/upload/nupon.pdfIn PDF document text
    • http://vxclouds.com/userfiles/file/4883410454.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/86127352148.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=watch+movie+online+free+apkPDF 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_off0000e01d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01D 18496 bytes
SHA-256: 8d0dc377d54e3bcdbf50448c04a3fc4fcd3fc87111f673709c43f1517a6fb5ad
font_01_sfnt_off00010fb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000127cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127CF 10728 bytes
SHA-256: 7b646c4ba3933384c620abf90317ad544d2e388e64a97917612d62aaac11b52b

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