Malicious PDF — malware analysis report

Static analysis result for SHA-256 f68011e289d6a402…

MALICIOUS

PDF

85.9 KB Created: 2021-07-14 07:05:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 224b0d3b30bdc8e3db8741f84ec6923b SHA-1: 71b64ffff06fe431d36f902c99c094eced71940e SHA-256: f68011e289d6a402e2d1cbb92ffa4308e9a117a2cd692b5df28638713f1576eb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file functions as a link farm, containing numerous URLs that point to external websites. Several of these URLs are hosted on compromised WordPress sites, indicating a potential phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/bul39aresl7h1invkpnaa85pf4/62991662884.pdf In PDF document text
    • https://istocdukkan.com/userfiles/files/55498805548.pdfIn PDF document text
    • https://rajakeempat.com/contents//files/wewagasajoxubajaduton.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/guvonix.pdfIn PDF document text
    • https://lifecareproduct.in/ckfinder/userfiles/files/titaxakumututipozaguzor.pdfIn PDF document text
    • http://teplospectr.ru/images/files/33089898581.pdfIn PDF document text
    • http://hk-dcc.com/wp-content/plugins/super-forms/uploads/php/files/bvp5256tmscntvcghrsbhb3d3m/lumotom.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/3b186dbdfaed245214d751434ccb2d11/83720538662.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e0c8c208d---75614096688.pdfIn PDF document text
    • http://bachova-terapia.sk/images/file/mamirufafivogaremafufajog.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/97669859280.pdfIn PDF document text
    • https://andrejc.si/files/file/sabimagalamezumisejozolex.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/resutagusatunatekikifa.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/fp2m3bsdu1q9eoags951qlnri3/netenuxegigap.pdfIn PDF document text
    • http://xnucleus.com/members//member_images/files/33545173922.pdfIn PDF document text
    • http://rchs1964.com/clients/5/58/580abc73d3aac4ea3a2bdd7c75327783/File/paginulewipe.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/lbnb11to2rfljgc0lm8g5f09n4/xokan.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/cgqbr11pauhb5kkjgmvd541rs1/29407119951.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97d8b70ba2---pisunolevobak.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/ziraxoraja.pdfIn PDF document text
    • https://faprosid.com/file/78042707051.pdfIn PDF document text
    • http://udaybharat.in/ckfinder/userfiles/files/95327137284.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b15fa81b5c3---36051451854.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=lateral+canthoplasty+koreaPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE279 10544 bytes
SHA-256: b6914d99f2b574ff5e6f7a155017373a9b7a469def5b8a57c619c8d663da8989
font_01_sfnt_off0000fa82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA82 17488 bytes
SHA-256: 33cf6a8a83a105c6e3bea9dee1cdd91e7e8df7e02012d5a0edefe9ebfc3b54e5
font_02_sfnt_off000128a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000140b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140B2 1672 bytes
SHA-256: f0c1d49bbda58d8e3c83d0d20444cdd4dbd39b9125817757cd1cbc557bdbc55f

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