Malicious PDF — malware analysis report

Static analysis result for SHA-256 2870205c48ab393f…

MALICIOUS

PDF

69.3 KB Created: 2021-09-28 03:44:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: eb2f37a1568aa195dbfff18a2df89361 SHA-1: dc31b9c206dfdd1651e45508827c3c71a4f7c404 SHA-256: 2870205c48ab393f934dcbc4485d3dbd040ad04574033ec45c5c5eb1a291f5b8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate high maliciousness. It contains numerous external URIs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. The presence of these links and the overall structure indicate an attempt to lure users to potentially malicious external content, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • 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 https://philabc.ru/uplcv?utm_term=the+amityville+horror+2005+streaming+vf PDF link annotation
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143a0b194b11---rusalivetu.pdfIn PDF document text
    • https://malmospelmanslag.se/userfiles/file/murudojipokonodisok.pdfIn PDF document text
    • http://hangtatmj.com/userfiles/63696758.pdfIn PDF document text
    • http://areawifi.com/DESARROLLO/userfiles/files/87523024885.pdfIn PDF document text
    • http://bharatandcompany.in/ckfinder/userfiles/files/nogodiwop.pdfIn PDF document text
    • https://n-tlg.com/files/file/45045667846.pdfIn PDF document text
    • https://sca-eagleegg5k.com/ckfinder/triplebuserfiles/file/97958193744.pdfIn PDF document text
    • http://autolubitel-irk.ru/userfiles/file/subidufudi.pdfIn PDF document text
    • http://tdbakademi.org/userfiles/files/48563275892.pdfIn PDF document text
    • http://origo.ws/userfiles/file/dedopaviwonamiruzisa.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e96ec598fc---kerivujibotunusafepujunor.pdfIn PDF document text
    • http://jmyhship.com/uploadfile/files/90197821335.pdfIn PDF document text
    • http://cx-gl.hu/images/files/27648739667.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/32417e61b5ffe923b11639f437653f44/16782612624.pdfIn PDF document text
    • http://local-minicab.com/survey/userfiles/files/jizexaburorovomipopodida.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/xagokekafixawupow.pdfIn PDF document text
    • http://gomsuhoangminh.com/app/webroot/uploads/files/wegejugevesokuwewijuloz.pdfIn PDF document text
    • https://ubranni.com/uploader/files/5463602190.pdfIn PDF document text
    • http://irpuyesh.com/cache/fck_files/file/17124655667.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/27563376184.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613956a2d2fe5---87588427116.pdfIn PDF document text
    • https://firesystem.ro/imagini_ws/fewizuzidaxeduresezekuvi.pdfIn PDF document text
    • http://domoticasociale.it/immaginiNewsletter/file/dibiruse.pdfIn PDF document text
    • 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_off0000b118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB118 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c92f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC92F 11180 bytes
SHA-256: 87a5e86206ea0e2ec7d9e23a62d90d9e3d3ef33015896b3c43f06ae0b665f36f
font_02_sfnt_off0000e344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE344 14536 bytes
SHA-256: d299d662dafd8b2de7b1e299d867795c7c636d5340aaf0561a849c05d89450bc