Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c2dacb722221e65…

MALICIOUS

PDF

82.3 KB Created: 2021-09-04 04:24:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9121ad5383f9bad52ef9dd2c42a822d5 SHA-1: 6291b80e9255e62e46dd18ada36d5afbe70ef7e5 SHA-256: 7c2dacb722221e65097e4760be79cfc17da76920a354a88391a65606a98c0abe
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple websites, including compromised CMS uploads and disposable hosting, which is a common technique for phishing or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the structure and URL targets are sufficient to infer a malicious link distribution pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://diedacorporation.net/freesiafiles/file/nogezamefekomovovotof.pdf In PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0ee903002---76680402669.pdfIn PDF document text
    • https://zbmbudomont.pl/userfiles/file/10460585722.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/zimumazan.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a54a24c21f---17179023778.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baa45025186---42169134867.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16102f55d64e31---kemaditorevarimesurarat.pdfIn PDF document text
    • https://msvadba.ru/files/file/90562358404.pdfIn PDF document text
    • http://busanpc1.com/upload/fckeditor/file/50305205360.pdfIn PDF document text
    • https://edmaker.site/wp-content/plugins/super-forms/uploads/php/files/daa59533cbce0ad28f37f4b8090e82c8/16065696824.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3bee6cef1---pitemegude.pdfIn PDF document text
    • http://clean-ecology.com/Upload/files/mugokun.pdfIn PDF document text
    • https://p1gtac.com/uploader/files/vovovamonopivaporuxukubu.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c32833a13c---ruxapovujedikim.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfcba2f371b---50819637132.pdfIn PDF document text
    • http://amdind.com/userfiles/file/39718678859.pdfIn PDF document text
    • http://npi-management.com/ressource/site-image/files/sudurag.pdfIn PDF document text
    • http://northmarking.com/userfiles/files/5568484204.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/nesakux.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/b7f37e94d143e66d95d1fb9018f81f2a/masedojixunowomivowej.pdfIn PDF document text
    • https://kawanmto.com/contents//files/tekufifixa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=xarope+vick+44e+bula+pdf+anvisaPDF 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_off0000d971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD971 18764 bytes
SHA-256: 3a4fb87ca46ed37be3f58e2de5d983b27803c7e083c1e4f271bcb351220d5885
font_01_sfnt_off000109ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109FF 11000 bytes
SHA-256: 8c76ac7121e9c17774c8a08cf15ccb6fef455206e0f7190bad84e510ee65a465
font_02_sfnt_off00012373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12373 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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