Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ec4b5462bc1ca1…

MALICIOUS

PDF

89.2 KB Created: 2021-07-08 07:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 22bddc5f5d69d2bfcf957fe9b14ede0f SHA-1: 7c1f858090847d3d34ce14768aae9a809a64bc25 SHA-256: 75ec4b5462bc1ca136e16b02cb0502ad8d6eb3a2cc2f72754eaa231b29badfa3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links, many pointing to compromised WordPress sites, which likely serve as a lure to download further malicious content. The presence of external URIs and link farms suggests an attempt to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 https://laborke.ru/uplcv?utm_term=wow+rogue+pvp+rotation PDF link annotation
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b85832d8c79---vebozerilibodulaxidasof.pdfIn PDF document text
    • https://bataretak.com/img/files/file/vajijelo.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16091806125b9b---gupafurewubewe.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5888f0ac86---45385111440.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/6cfe69241b6dce6362b87a929bad24cd/18404276206.pdfIn PDF document text
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/5465710977.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/08a7cf6bf1ca9f0fa09276e95c2649b6/91523339307.pdfIn PDF document text
    • http://belgium-ex.com/jenemumidinaduzufixe.pdfIn PDF document text
    • http://moderncarrent.com/user_img/files/31867349858.pdfIn PDF document text
    • https://maturana.cl/upload/file/29197421978.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/1cb0e2d3929b24f3b8b9750ed5956045/retibisu.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/79262424455.pdfIn PDF document text
    • https://ctapigroup3.com/contents//files/basamevigalav.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/cd464330b3ee47320939fccaef9b78a5/toxadexaf.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16074f945db541---munadexulopumezogudoziw.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/uadr8p86j18t1pbsqja73gg4l7/1572648010.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160740510a544b---wugaxawefiriwol.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/99319500752.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/xixamebor.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081e6e993ccd---virejerubefo.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/fhgjtsnbisfa81edlrdbbd7e46/60897410278.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_off0000fb88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001139a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1139A 16984 bytes
SHA-256: 8c35a2d94bab86451b3cb5975d968898e44947e6e569656909b65d28fe2df9d7
font_02_sfnt_off00013fe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FE0 10456 bytes
SHA-256: 94ccb9be259ac6cb1a950b633329e7d3036703b75abd831665062916ed269944

Open this report in the interactive analyzer, or submit your own file for analysis.