Malicious PDF — malware analysis report

Static analysis result for SHA-256 74ed974a05c460e8…

MALICIOUS

PDF

82.6 KB Created: 2021-09-20 20:49:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 082f047b76a10a8bb6d7e6afa753d2f5 SHA-1: 5e64dd6d17342bf8d01ed8509fb71afb227aea2d SHA-256: 74ed974a05c460e8cb58416b32a2bac3de6568c522dd426f98bdeabc93d1acfa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised CMS upload storage or are part of a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were directly extracted, the PDF structure and embedded links are indicative of an attempt to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1613ca1a53e44c---rolegol.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144f16f717e4---36417485389.pdfIn PDF document text
    • http://huzatfokozo.hu/editor_up/kitemarowukemoj.pdfIn PDF document text
    • http://an-professional.ru/img/files/file/wijaso.pdfIn PDF document text
    • http://huspanda.com/data/ckfinder/files/galijulefiri.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/sifozinaxod.pdfIn PDF document text
    • https://tttinox.com/upload/userfiles/files/furuwabinuxudoluwemenaf.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae61ecb5ee---93813916979.pdfIn PDF document text
    • http://harnettcountyhba.com/userfiles/file/makumuruxor.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16137fe0061067---gilexasudiluminasun.pdfIn PDF document text
    • https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/tijofodijejurapekaf.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c94427dee4---xeteriwedag.pdfIn PDF document text
    • https://www.hermanosvalerorecio.com/ckfinder/userfiles/files/kufeguxaxebusiv.pdfIn PDF document text
    • http://bakersfield.thepokeluau.com/uploads/files/42689090264.pdfIn PDF document text
    • http://vin-baietii.ro/ckfinder/userfiles/files/dobijala.pdfIn PDF document text
    • http://aardbeienfeesten.nl/uploadimages/files/wofezegatoditexofisuji.pdfIn PDF document text
    • http://gshosnab.ru/userfiles/file/kepamezijen.pdfIn PDF document text
    • http://th-hl.com///upload/files/63367848607.pdfIn PDF document text
    • http://darstin.com/userfiles/files/fegapi.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/xobog.pdfIn PDF document text
    • http://aisne.proximeo.com/ckfinder/userfiles/files/86039474281.pdfIn PDF document text
    • http://severstroysnab.ru/userfiles/file/64522285432.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/63393022360.pdfIn PDF document text
    • http://nuovartea.eu/userfiles/files/gerudoxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=zf3d+hack+unlimited+moneyPDF 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_off0000dfd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD2 10912 bytes
SHA-256: 53fd379645fe999f3a921d8df52fed905ef41b86b0212455221085ea63f0d6cd
font_01_sfnt_off0000f8fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001110f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1110F 16988 bytes
SHA-256: 178282b240f3d8a7da66375e6631f421f5b6950ed2e7a58db19af6ac6746d8e1

Open this report in the interactive analyzer, or submit your own file for analysis.