Malicious PDF — malware analysis report

Static analysis result for SHA-256 fabe020095ca6dab…

MALICIOUS

PDF

70.4 KB Created: 2021-09-25 02:28:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 5fe5c53e798f47105bc1d011cc8f0a4e SHA-1: c702757b9fa406c79b3e5c49072b65e5b10e6325 SHA-256: fabe020095ca6dab7e618858b9ba18b7f58e68e653ec441587512ee5075e1925
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of multiple external URIs and link farm heuristics supports the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://colleges-in-tamilnadu.com/FCKeditor/userfiles/file/6182501651.pdf In PDF document text
    • https://interstudy.net/userfiles/file/rizibomidan.pdfIn PDF document text
    • http://alwaditrading.com/userfiles/files/pofaz.pdfIn PDF document text
    • https://ldcpc.com/ckfinder/userfiles/files/75838752742.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614359bf136bf---zapuj.pdfIn PDF document text
    • http://rotarycochinharbour.org/ci/userfiles/files/gutotapirade.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/57709557614.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bbefa019ea---xekabiwesimifomemin.pdfIn PDF document text
    • http://laduses.nl/image/file/gigavenadenisewusobu.pdfIn PDF document text
    • http://ljsmelt.com/upload/files/xukamesimirejugogibogex.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/95440004212.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614a1b45e4f28---82549323563.pdfIn PDF document text
    • https://aokman-drive.com/d/files/pujodelonuka.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f11537940a03fb69a992cde1c54b4566/soturesutix.pdfIn PDF document text
    • http://neteyes.eu/editor_up/78366453104.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/xufefo.pdfIn PDF document text
    • http://nail-free.com/ckfinder/userfiles/files/91956050915.pdfIn PDF document text
    • http://studiotecnicopetrillo.eu/userfiles/files/25055709608.pdfIn PDF document text
    • http://topimmigrationlawyer.org/ckfinder/userfiles/files/wubaguladavovotamo.pdfIn PDF document text
    • https://najlepsze-w-polsce.pl/uploads/loniwurasegagenovejotipi.pdfIn PDF document text
    • http://eros-arena.com/eros/userfiles/file/kodulekimipazogaxeji.pdfIn PDF document text
    • http://sethhukumchandschool.com/userfiles/file/sabemetorivitu.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/cd98c24124073c452dbe8eb24f2a9c8e/73593342846.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/dfshh31uc826ql3qe3clg3vcle/44350843569.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=live+tv+app+apk+freePDF 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_off0000b136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB136 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC94D 10028 bytes
SHA-256: d6f1c6804c92e095df5740528b0259d077de7c2ef57969dab0321eb5aab9dc52
font_02_sfnt_off0000dfb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB9 17464 bytes
SHA-256: 678ccc35d3dd01b8f43ca935df6533f0b15b8957313a64c892dbc96392277dbe