Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0eadadb24a4c2f4…

MALICIOUS

PDF

95.6 KB Created: 2021-07-22 08:35:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 1e6fd44d7a7238920868f19b986b4d81 SHA-1: 811682b937844c87a454c43b93d756adcfef9f4d SHA-256: c0eadadb24a4c2f459d2cc6e48b70a7f43d9e9d6263b2e2eebca3b04625ebd3b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/cgap5hiahapunodmsqb4ccuo6i/19993854195.pdf In PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160840dd897a9a---kalovuf.pdfIn PDF document text
    • https://europartner2.pl/uploads/53026896381.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080fbc4e24aa---bubiwadeguxuxenav.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/jiwimekexumaxolunikuvuvu.pdfIn PDF document text
    • http://atek-ent.com/upload/file/kirugikolomifubexuwimorom.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/8182382575.pdfIn PDF document text
    • http://tischlerei-schlusche.de/sites/default/files/file/75058633809.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/mck3g9nas0jpel38sg9prvhluk/42268945240.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160890fcd096b5---61669967381.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/c3dbc8a9ea5541177dedd2ca5ff74e41/wedon.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/bujapavatake.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc7095ad5d---dawexozaw.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4fcf8e7eb---79549653785.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/1ndc61beeqi5c4h6c0tj2k8o11/fijigozizifusitovas.pdfIn PDF document text
    • http://www.malagatour.es/ckfinder/userfiles/files/wufitisepatofiko.pdfIn PDF document text
    • http://siciny.pl/userfiles/file/53216121927.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/a9bf41aa6eff12ca3d5196feaba3bd71/94674262886.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/063b632316134809f05b99c553db4e1e/9127810131.pdfIn PDF document text
    • http://mousike.it/img_ins/files/jokozemukimeb.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/fd2l3575k793r4reh3vaulv35u/kukibovuvedubu.pdfIn PDF document text
    • http://wami.cc/data/files/zasajexowiwape.pdfIn PDF document text
    • http://tkhomedeco.com/assets/uploads/ckedit/files/20210609135123.pdfIn PDF document text
    • https://pellevah.com/upload/files/gedoxuraropodomogigezek.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/880a9c94a80ff7b68adfabaf43d58205/sujenugiwifa.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608a527ba30c3---98588764786.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/3f8b86f7193cca0bf344af53c9c5ef78/xafafexebo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=project+report+for+medical+store+for+bank+loan+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98D 11144 bytes
SHA-256: 5906dc119a2ac374f340d5a5df60ff30c174e13ed82cea0022d285bb66aa3526
font_01_sfnt_off00011351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11351 17484 bytes
SHA-256: 4d9f4b8bcc8af2152e2601552e783d15e01175378a48d008d4de48217557f7a0
font_02_sfnt_off0001416d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1416D 16144 bytes
SHA-256: fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516
font_03_sfnt_off000156ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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