Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ec2f7a5e2d11162…

MALICIOUS

PDF

89.0 KB Created: 2021-07-05 16:25:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d444e6b7f9d22e5c82a716db36488fb6 SHA-1: 880e5eea82af9f48c412c4995274918a3458e066 SHA-256: 7ec2f7a5e2d11162b9887abf19147a9bfad34a52f1e2f0968535db42516beaa7
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple domains, many of which are hosted on compromised CMS platforms or disposable domains. This structure is indicative of a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 http://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/fogibefik.pdf In PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8855bf72f---55341891447.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d2a69be9936---lobidezifinebuke.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021062107013690.pdfIn PDF document text
    • http://aps-mes.com/files/file/soterimugaxodoxefoxetojol.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/d17a6bda9b5590d97f434b5f215e8211/2393002640.pdfIn PDF document text
    • http://tingchucontrol.com/Uploadfiles/files/4802623503.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071175a99584---xojofolixexarakoton.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609632caa9758---47713321370.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/v6f36dcc2158p3bdo4gdd7egt4/91668106815.pdfIn PDF document text
    • https://onelineservice.it/file/54511464833.pdfIn PDF document text
    • http://dzbnf.com/upload/file///9841550632.pdfIn PDF document text
    • http://ceskylakros.cz/userfiles/file/bepivuwaguvibewokixaxo.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/13591362709.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d22602e83fd---55832536891.pdfIn PDF document text
    • http://boldogelet.hu/media/nakenoxenuvusedi.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160750305987a4---jovuporixuvi.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/wareravunoli.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d81f4af17---47300965804.pdfIn PDF document text
    • http://murphysbeads.com/clients/54316/File/42593027719.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ea18b18ab492a7d6f2b9aee2100d2ad8/nozetanigafaxutilolebata.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ada8674b626---22167610037.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=i+just+wanna+love+you+all+my+lifePDF 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_off0000f702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF702 10724 bytes
SHA-256: 9ef4bf272cefa2b60f043e36593f9fccf1efaa91ffabea7eff169ae803e024ca
font_01_sfnt_off00010fa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA8 17876 bytes
SHA-256: 4e36215b647aea7bde85eedb8c821fb788f8d7b7cb7918c22c333f9adbe9bc31
font_02_sfnt_off00013ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1