Malicious PDF — malware analysis report

Static analysis result for SHA-256 07c7c43fd4110dad…

MALICIOUS

PDF

90.5 KB Created: 2021-07-26 01:06:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 39a82a1824d03d6a22544ff7d91d2709 SHA-1: 5812c1619a68577b2de069a1b6cf15248f6a9506 SHA-256: 07c7c43fd4110dad3360bdd44361fbd162e1ac3b79534ec6013eb8b418f5b75a
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links to compromised websites, indicating a phishing or credential harvesting attempt. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests the document is designed to trick users into changing payment details. While no scripts were extracted, the presence of embedded URLs and the ML classifier's high confidence score point towards malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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 http://archimax.ch/dynamic-images/cms/file/xelarubakirada.pdf In PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086a7fc36711---85397511818.pdfIn PDF document text
    • http://nnrhc.com/clients/9/98/980d61ede38c9a35fe3396fb65651545/File/ronasatemaseg.pdfIn PDF document text
    • http://centralwestwoodclassof1983.com/clients/c/cd/cd4b3c89dd1500142a52f05b9125c350/File/10078865265.pdfIn PDF document text
    • http://studiofantino.it/userfiles/files/gobisixezezepox.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/16ad91b6c9cec25a0c2713ebed7f6474/63703882855.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c1f72f452---tigiretavesatosibufekula.pdfIn PDF document text
    • http://somsit.com/ckfinder/userfiles/files/juriso.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16078b1015dbe0---77807061679.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/xepug.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16092a3015dbb4---69943010956.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a539e1ac38d---2326984161.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/0qvipmji48rldmgukpbsm5s3j3/fokep.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f2c1cac9d---vizuregifaw.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/68a5b7243569cc84406ee8818bc1d74e/zanividem.pdfIn PDF document text
    • http://voxel-avocats.fr/uploads/file/418019038.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/eavljrt4pt37df26s36t9f1v1p/20385054374.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078a6cfa6b75---bugetoxojovovasuvare.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/94101025779.pdfIn PDF document text
    • http://elvirajogsi.hu/ckfinder/userfiles/files/77250665332.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c1013b8b1b1---ruzubof.pdfIn PDF document text
    • http://arlingtonhigh1961.com/clients/e/ef/ef36f0800c0a5d5a0b00d5ecc8c3c6da/File/gowonoduvibumisin.pdfIn PDF document text
    • https://magerp.org/upload/files/24434876200.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210518212703.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=sbi+sukanya+samriddhi+account+opening+form+onlinePDF 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_off0000fc90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC90 16836 bytes
SHA-256: 7b468a983bdfaa53a30f04caf285d76be259010eb4af9f607f22042e0aa743f1
font_01_sfnt_off0001284f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1284F 11588 bytes
SHA-256: 1a7f27882809d5f1d167b391b7877db3dec6c9b664365994f8d0d70b9f8836eb
font_02_sfnt_off0001433a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1433A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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