Malicious PDF — malware analysis report

Static analysis result for SHA-256 3514049e34fabd32…

MALICIOUS

PDF

72.9 KB Created: 2021-09-02 08:59:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 19e5ff189a257bac97053bfe984dd106 SHA-1: e71482b5673ae1b5636284e8dc114ecd3593e07d SHA-256: 3514049e34fabd3219bb817526fda387ac6ef72dcc7281bdd5febae164efc11c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious destinations. The document body is heavily obfuscated and unreadable, providing no direct textual clues, but the heuristic firings strongly indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://rungruangsteel.com/public/upload/userfiles/files/tusosanujosagokif.pdf In PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/d676765b4ba86bb6faffa7c5202db4a6/74944909999.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/ac22dcff77d3ecb0086a7997ace7d39a/molupidaxosa.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb1e082fe4---99321081909.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/n3gjimgvvqpmf1qhovtbgiijuo/81196892409.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/k8kqudiv3bvd9oulc654192d59/banuwedurev.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836d0820360---5451470892.pdfIn PDF document text
    • http://turksebruiloften.nl/userfiles/file/jubaregajer.pdfIn PDF document text
    • http://gardenofsound.com/userfiles/files/zewufelodosenelegamabo.pdfIn PDF document text
    • http://didongsinhvien.com/upload/files/siraz.pdfIn PDF document text
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/vigawutosadutepe.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/6113995a579a93326f03d5777fa7080c/17356997508.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/47105127913.pdfIn PDF document text
    • https://sinarwaja.com/account/files/24606421394.pdfIn PDF document text
    • http://texasstatealphaxialumnae.com/clients/f/fe/fe72632f573fdc77cca6b85875c63e8a/File/vupij.pdfIn PDF document text
    • https://serwisnawigacji.pl/userfiles/file/vikerevifodijovixul.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/kmpfehus6a23an7m9hs50r5t57/nekumavamitifigad.pdfIn PDF document text
    • http://www.dean-cpa.com/files/adminpic/file/84316709361.pdfIn PDF document text
    • http://bluebossa.pl/files/file/linonoxibesimawonemufot.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160fac75794b01---39655524462.pdfIn PDF document text
    • http://uss100.com/clients/5/56/562308f4da1da23328cfd9e5c9f3e68f/File/37358259959.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff03c064054---mikef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=ncert+solutions+for+class+12+maths+chapter+5+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B1 11268 bytes
SHA-256: a41d10c6270810b42e6e17d14d2606cc58d7e3af070f802d7129eceb020efe5a
font_02_sfnt_off0000ed10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED10 15964 bytes
SHA-256: 7dad5f84b50cd6e3a45e13c6b6a38edb4a022b9b12335e3a4b9455e6364f5244

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