Malicious PDF — malware analysis report

Static analysis result for SHA-256 c68ccc7da7ed9626…

MALICIOUS

PDF

83.0 KB Created: 2021-09-09 08:14:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b21b90603ed8213e042e0d93bacd12d5 SHA-1: 00d1db883900fc0d4447e869b3fa2e9bbb100095 SHA-256: c68ccc7da7ed96260b18bf1fdd229d5b0ea5facfc322047dc8958cddfee0412c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lure users to malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • 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
  • 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://drafthe.ru/uplcv?utm_term=m365+tools+apk PDF link annotation
    • http://frankslawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/11228624995.pdfIn PDF document text
    • http://dharmapuridiocese.com/svnprojects/DHD/Source/images/files/7660618883.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/58539256098.pdfIn PDF document text
    • https://jimsdelibrookhaven.com/demo/jimsdeli/admin/userfilesfile/pabosez.pdfIn PDF document text
    • http://traiteurluc.com/userfiles/file/90973984371.pdfIn PDF document text
    • https://groupekheidri.com/ckfinder/userfiles/files/tamijoret.pdfIn PDF document text
    • http://saringkarnwood.com/UserFiles/file/wubelero.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613957419efd5---subilonafeviwuzebokijen.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/loxademudoni.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/75324122676.pdfIn PDF document text
    • https://safetypadlocks.eu/eurostyl/photos/file/tomoxuluratinebemukejow.pdfIn PDF document text
    • http://taiwangallant.com/uploads/files/202109031425208688.pdfIn PDF document text
    • http://www.kevimotor-rock.hu/files/files/35521237366.pdfIn PDF document text
    • http://srividyaastrology.com/userfiles/file/pewavimesirulefozal.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/jjl522p9l9bjge3m6qma74ukah/24551057829.pdfIn PDF document text
    • https://el-tall.pl/pics/file/rodorupufovozomifikona.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161395502c7297---buzuxur.pdfIn PDF document text
    • http://client.diffuse.info/files/75701858306.pdfIn PDF document text
    • http://takramaipai.com/mypicture/file/zetidevisudipufote.pdfIn PDF document text
    • http://jamalcar.com/userfiles/file/fonemesamezirotajomo.pdfIn PDF document text
    • https://marcvandewiele.com/userfiles/file/25473055879.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/80321961555.pdfIn PDF document text
    • http://www.rannatennis.ee/data/upfiles/files/22035261335.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_off0000dee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE9 18556 bytes
SHA-256: 5b66192ec6f7aa693f4bb47160ab17cab3d3ba8f72e63cf063a01ecd92e5cff2
font_01_sfnt_off00010f42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F42 10376 bytes
SHA-256: f69067cd1437b91675ee866179f0350c865c036d8a46b3fc561041b549a0216c
font_02_sfnt_off000126f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1