Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d85a98895377657…

MALICIOUS

PDF

74.8 KB Created: 2021-09-12 02:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ed6aa6e7e8e6cb7a8cce3cdf60c0c1a9 SHA-1: dc65288346a16bb11b5ed59a016192b9e168e159 SHA-256: 1d85a988953776571b5838aa1479e7de4bc6c6ff17a12924eb1319901d1d1fdc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and other disposable hosting domains. The primary purpose appears to be redirecting users to malicious content, likely for phishing or malware distribution, leveraging a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7561

Heuristics 5

  • 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
  • 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://crewmak.ru/uplcv?utm_term=watch+one+peice+online+free PDF link annotation
    • http://all-premium.com/user_file/files/tusefugujiponizuragote.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/88917074977.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161396f0906f4d---wogegegitibupalamale.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec68bb7410---8964811819.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/63539274496.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613d2ea14509f---ginejoke.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/78894189120.pdfIn PDF document text
    • http://imhyuk.com/imhyukeditor/userfile/file/mesow.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/655a5c76114714db8535379a81cf572f/dobewijixutijunu.pdfIn PDF document text
    • http://milkyway-vn.com/upload/files/kapeliw.pdfIn PDF document text
    • https://sportcity.bg/webroot/img/content/files/49792689812.pdfIn PDF document text
    • http://pro-group.ru/userfiles/files/35835794415.pdfIn PDF document text
    • https://livewireeventz.com/userfiles/file/fovoped.pdfIn PDF document text
    • http://aloeverajuice.cz/files/file/jobokuxalejife.pdfIn PDF document text
    • https://unitedfightalliance.jordanadams.com/ckfinder/userfiles/files/94048966658.pdfIn PDF document text
    • http://huseyindurmuslar.com/images_upload/files/dukagaba.pdfIn PDF document text
    • https://pasarangroup2.com/contents/files/molasib.pdfIn PDF document text
    • http://plenerowe.kbo.pl/ckfinder/userfiles/files/12118809921.pdfIn PDF document text
    • https://ccichn.vn/data/upload/file/84483602207.pdfIn PDF document text
    • http://vitacanes.com/uploads/files/72768183811.pdfIn PDF document text
    • http://minerva-collection.net/files/files/34635124974.pdfIn PDF document text
    • http://garankuccu.com/upload/fckimagesfile/58fecbc332cd7e91c103889444cbe395.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/56085639035.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB5 17844 bytes
SHA-256: a2c420458324f46377f91c8731d6b725c4073f06c16e17bd23c09e0767d48645

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