Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0255a3291266511…

MALICIOUS

PDF

85.2 KB Created: 2021-09-04 21:14:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 9e359a68b74866b90d5571634980d520 SHA-1: ff77dc02b5c960b6c3c9d03085bd98a1119eb2d7 SHA-256: f0255a3291266511a0204530bccaae181c94540fbd5075dd942b282745604124
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/90bec2a34e79cde50e8bee04b42d3bd8/85920175020.pdf In PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/0mptk6av86eqng2nk3b3bj184l/bemiparajuledowepinukuto.pdfIn PDF document text
    • https://akrmedia.no/ckfinder/userfiles/files/38960626922.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210725210320158.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/gewexadobofinidobu.pdfIn PDF document text
    • http://www.polni.si/Images/files/jefazonajebudunigimom.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/wanoguxizijonixituvakuri.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/faa5dd15400b34275ad4b6ca7b35ed40/23331848396.pdfIn PDF document text
    • http://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/63975893578.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/77b6ee1590d54a0582e6fb43700db2f0/73011443695.pdfIn PDF document text
    • https://uclerbaklava.com/resources/file/70796835642.pdfIn PDF document text
    • https://binhvi.com/upload/files/mikufo.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/50htb7t304tpbtanrbru30920v/20933358915.pdfIn PDF document text
    • http://fecirturizm.com/resimler/files/xaxixawesemidupu.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/7271e04da25b8f271cc2eb785f825e31/tavovovonepuborud.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16124cdfa0e441---davup.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6adb814737---larin.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/3012784954.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/e85bc8e9d447d5ba3c79793782a7f003/64042550863.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/58130771508.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/t6gqje7p88b3ofisrqlm6i0obt/pubujejibiwagijig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=enfermedades+pulmonares+obstructivas+pdfPDF 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

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_off0000e43b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43B 18740 bytes
SHA-256: b25bcfc5093c206092c11cfeedca9381b6122e5ef35a54cb30f4aea5034b56f5
font_01_sfnt_off000113e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E9 11072 bytes
SHA-256: bab446458070c8bcf4af837184147697f2bfc0680b1cae599a429de3cb4ef9e8
font_02_sfnt_off00012d74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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