Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee513072f9ee0024…

MALICIOUS

PDF

95.3 KB Created: 2021-08-01 22:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bf933ece0674c22d4c0e8aa35050abf8 SHA-1: 62b9d89a1b00f5d756675686f1ec5b1b0e835a06 SHA-256: ee513072f9ee0024492e113a65c95e2b80ac08b95500794b9ba50d402843ae01
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a phishing or malware distribution scheme. The primary attack pattern involves redirecting users to external URLs, likely to harvest credentials or deliver further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://garglob.ru/uplcv?utm_term=ikinci+el+ruhul+beyan+tefsiri+fiyatlar%C4%B1 PDF link annotation
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070207245567---kifimupubin.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757d89a0d5c---66480805941.pdfIn PDF document text
    • http://comlark.ru/userfiles/files/38801715698.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/kibumure.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/93223578371.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091b2a95a356---jiwafun.pdfIn PDF document text
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607378b31edd9---vevilozaxi.pdfIn PDF document text
    • http://dnepropress.net/files/file/368767492.pdfIn PDF document text
    • https://ferdavagnar.is/images/fck/file/kewowobudozupolabij.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc130d2851---xexexufegesenu.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/2fd244283b3e7ef39fa8f920fa39a235/vuponolevom.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/paribipujawomajivipases.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/nabegijajadijotev.pdfIn PDF document text
    • https://posaonakosovu.com/ckfinder/userfiles/files/rosefajofaradojoda.pdfIn PDF document text
    • http://goldartline.ua/userfiles/file/sexiviwizu.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/0mb3m9lbpnomp3ckpflm4hb3qh/fikevimodovilal.pdfIn PDF document text
    • https://carcarnet.com/home/sandbox/domains/hkdance.tritek.hk/public_html/ckfinder/userfiles/files/45962426554.pdfIn PDF document text
    • http://nkcophs50threunion.com/clients/0/01/014062e559e26c1cf0711bcec4e573ae/File/72400917348.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/j5h2ks8snpq4r0r8t4kbknkvp4/bovamawetiri.pdfIn PDF document text
    • http://ndt-ultratech.com/files/jujamuvila.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/soninofonosod.pdfIn PDF document text
    • http://dakmoto.cz/obrazky/file/55068554209.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/93842039801.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/files/kenajivad.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160baf5709d2cf---badigeg.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_off000110dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000128f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F3 10756 bytes
SHA-256: 332dffaaecd2065ba86393db2482fe8dcc7816b5b81bc2a8644c9ca87021e799
font_02_sfnt_off00014195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14195 17668 bytes
SHA-256: eb0f9dc4c2777714ad76d1f79ca786149cf8cc8e4954b4453949ac67097d27a0