Malicious PDF — malware analysis report

Static analysis result for SHA-256 700bf4b28433b969…

MALICIOUS

PDF

84.6 KB Created: 2021-06-29 09:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6063cbe6e6609dd12fb6e64ecee6f3f8 SHA-1: 94dfbc3ff9e55eb60ab0be3c772f657aa4512072 SHA-256: 700bf4b28433b9699961a0b60389ac3155aba68ad519c012f7d2eaca2b7202fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links pointing to various domains, many of which appear to be compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to distribute malicious content or conduct phishing. The presence of embedded URLs and the overall structure strongly indicate an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://huntic.ru/uplcv?utm_term=partnership+dissolution+agreement+example PDF link annotation
    • http://chataphan.com/file_media/file_image/file/60389086552.pdfIn PDF document text
    • http://amtutoring.com/clients/865321/File/gigigelifijupela.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3c6b56cb87---kugisexawofojegojikinob.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbc9aaadda---pijamozogukej.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/16104348214.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/0b5c5fc1ddf9f82a49387edc41ce6aab/sojarepulopatobelefare.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc8fe6f99d---wupexivibezozibow.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d12be0aa58---17439821612.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/76320106744.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091a408f3dab---tigeseposonal.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/92018467060.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/mds7vkameoscrdo5dfpqjnvv40/80382838911.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/cac5bc5ddce773757a92b5f04c13ebe5/sopojinanetora.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf2b40232a---fusebapagazis.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6e0f14178---28454562966.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/lvqe813g4f67t4c137eq9rkqsr/zuretuxulilazudovatowi.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/75290783546.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/e734a0296136b22e97091cdcf8cbe659/4892310345.pdfIn PDF document text
    • https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16073bf8f6e859---juminatudoxepiliporewoli.pdfIn PDF document text
    • http://seksdagen.nl/userfiles/file/jipidetuketemub.pdfIn PDF document text
    • https://seitonsolutions.com/ci/files/49297422971.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/sezijavejuropujur.pdfIn PDF document text
    • http://industra.sk/userfiles/file/xuzoj.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/da1dd4c1724269bfe59057d7763b3d88/60463198099.pdfIn PDF document text
    • http://globeksa.com/ckfinder/userfiles/files/niwanivugobu.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_off0000e5f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F3 11040 bytes
SHA-256: 3526c0d5c9b37e60bfc1c9ca08efb4c9c42908d34894b2121b283e829162645d
font_01_sfnt_off0000ff39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001174b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1174B 17748 bytes
SHA-256: 33749168b6073333487fc0d5b8f7dc63d0d02f316d8d3a9b635c7b505625e5bd