Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd3ca8617f8dd3c…

MALICIOUS

PDF

78.9 KB Created: 2021-06-14 23:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7934714fceff4b7b55318e4b2aacb87f SHA-1: a1a607e646e26b29fbda61efbe8f342b5a5fdecb SHA-256: ddd3ca8617f8dd3c9222d1c079317832c5edd9885f91702a9a5df1d2edb06036
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs, such as 'https://garglob.ru/uplcv?utm_term=tok+liker+apk+download', likely serve as lures for users to download malicious applications or visit phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://garglob.ru/uplcv?utm_term=tok+liker+apk+download PDF link annotation
    • http://alpha-cp.com/userfiles/file/24408442911.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7df7377e02---59732912752.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8192c42899---jejukadoku.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/a602e55ddcde9e8ba75e4f9af24ef9fc/jepowuronotiba.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d462eec2f4---wesovugejewe.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075662a479bb---lumazavuromutevopina.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160840655bc4a2---bojaxewawawisujile.pdfIn PDF document text
    • http://detskaoptika.cz/ckfinder/userfiles/files/vujupas.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e663f1fa0d---jexedamuvidibizilugovutav.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795cd0a2402---29024092627.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/wodupelaviwaxedijufomu.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/968u280usqbkks6l5p4e2sgn16/69474642925.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog//file/49304787140.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d50bf472bb---netogibepalomokejoxuma.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607320535e3b9---59842556310.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a19b3130857---ditele.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aa466c3284a---zujoditovimiwam.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/fd3597099bdbc621b39946a9953a74e8/rudelovijipeza.pdfIn PDF document text
    • http://cuacongtrinh.vn/upload/files/getegalagiribozevovamo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF9 4880 bytes
SHA-256: 6dfe95897eecbc44f0ef3a13feba195b4d6db7ae6259ddbefa2177ea3461f03c
font_01_sfnt_off0000feb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB1 15468 bytes
SHA-256: 2117eb2b1bbc70fe7edf5fbe528319b586214e1f2c4b643fdf37a256f2688d83

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