Malicious PDF — malware analysis report

Static analysis result for SHA-256 59274f3b3977bb14…

MALICIOUS

PDF

81.7 KB Created: 2021-09-17 06:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 605d5749aa80a0243169691a8dffd1b2 SHA-1: 9bf3d3d96e70f27b04678432b96fdbce3957c4af SHA-256: 59274f3b3977bb14ed49d455428cf4b647d83bc5459e8bb09168a4b6c03df330
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, indicative of a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://queure.ru/uplcv?utm_term=talaash+full+movie+download+720p+bluray PDF link annotation
    • http://kantipursecurity.com/userfiles/file/42871635761.pdfIn PDF document text
    • http://www.yevres.fr/ckfinder/userfiles/files/jopuniwukibo.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/zaxogowunusapawajulo.pdfIn PDF document text
    • http://dtmaso.com/public_html/Imagens/file/77976283439.pdfIn PDF document text
    • http://snabsz.ru/ckfinder/userfiles/files/29219627894.pdfIn PDF document text
    • http://envisystem.com/upload/userfile/files/59873972473.pdfIn PDF document text
    • http://knipia.com/userfiles/file/81483226589.pdfIn PDF document text
    • https://ecohort.biz/userfiles/files/kinovogabarawefowamozi.pdfIn PDF document text
    • https://beta.nhatthiengroup.com/files/uploaded/files/gobapof.pdfIn PDF document text
    • http://tiyuchangdi.com/upload_files/files/20210913_080449.pdfIn PDF document text
    • http://celesteandtorsten.wedding/images/file/turorulepe.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/44461286204.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136d7002d0e9---lifavawomalim.pdfIn PDF document text
    • http://mengnuanua.com/app/webroot/files/files/butejibizuvove.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/83840510248.pdfIn PDF document text
    • http://studiogeologicotrilobite.com/userfiles/files/fonaxigeril.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/29143722271.pdfIn PDF document text
    • https://hotelgaric.com/upload/datoteke/64774399180.pdfIn PDF document text
    • http://dentistturkey.com/image/files/86479813996.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614163026fe62---makeluvugesizag.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16143f3892a58f---13203181933.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_off0000da35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA35 11428 bytes
SHA-256: d1a66ca5d870f91b8bf3b64c7087ef09a79959c8f43b2aeb5ec5d8117044270c
font_01_sfnt_off0000f4e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E7 17256 bytes
SHA-256: 6c6a5605069b73d30e99d654755a99a4b569b2960036ba51351c62029ea78f9c
font_02_sfnt_off000121b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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