Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ba25813a99c3cf…

MALICIOUS

PDF

94.1 KB Created: 2021-06-26 15:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 7c0c96e8552e33549a7ee746d8d746cf SHA-1: eebbc24a566836cb0e0d1c9c53abb58860f96910 SHA-256: d6ba25813a99c3cfa94a73819cfff228c73541a20a964e0a4812d7c8e23c42d1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file functions as a link farm, containing numerous URLs that redirect to external websites. The presence of multiple links on disposable hosting and compromised CMS uploads suggests a phishing or malware distribution campaign. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious intent to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://wastran.ru/uplcv?utm_term=ielts+reading+13+test+2+answers PDF link annotation
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/72fef8fcffff3b3b24f20e1dd1bdaa69/gataxupos.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f75573539---tumixejodovikixikugezo.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/dv3phm59nq9jquhf1loaqrd0f2/84578352172.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/77086748547.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/7gmfpv6qacj3h00phi7teroe4s/bagabuvu.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf74f61d15---77227063507.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/it0cevj2j7ah7pbb7psf55frm4/21385774354.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/5189716590.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160802e7033f6c---26868112153.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/22637042089.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160815e1e90cd0---54520679771.pdfIn PDF document text
    • http://extintoresorigen.com/images/editor/kekopitutinupinivodejuvo.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/toviwamisow.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/f95b0fc9680d43f8acb050b28e53a11d/50891564850.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607377bf03c76---kamewifawadiwori.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/89a3779ee99bd9ea30846fec66b114ec/lawobewemafizogenanev.pdfIn PDF document text
    • https://ahha.az/userfiles/file/tijifoterixabe.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/26491276586.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16094b4a0e05d9---88293827765.pdfIn PDF document text
    • https://pmms-online.com/assets/file/xofaruzipeweteparibigive.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608573948974c---xegafitupu.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609887b908401---95696276652.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/586a3a8a65c085ba091076e3ec10cb7b/71520667616.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/37806296360a265c053d6b.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/nuxufap.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/radelomam.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b83d9a5f475---3314135195.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5C 17912 bytes
SHA-256: 9434157c3960c7b059669932ff1588d6cd0d3d9989befce40993b887567f5c90
font_01_sfnt_off00013a23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001523a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1523A 10684 bytes
SHA-256: b693927363e6e4da1115831d41203141b0cafadad8d8c74cd26671a5fd218dc4

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