Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa0548ce80ad8b5d…

MALICIOUS

PDF

80.9 KB Created: 2021-09-20 05:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 40d7e5ae79d2e526261787cf6a5d5dd8 SHA-1: 39d26563b824d3b798728e5983a11d9391e24722 SHA-256: fa0548ce80ad8b5d941604f7d57d1c44fd5169b5eecd786fbcaa06cfa64b5080
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://smidgel.ru/uplcv?utm_term=notes+android+sync PDF link annotation
    • https://cebubigsellers.com/userfiles/file/782558318.pdfIn PDF document text
    • http://rancholasmonturaspremios.com/campannas/file/dogalurukebutozupase.pdfIn PDF document text
    • https://tidymoney.com/ckfinder/userfiles/files/wokelukigalanamaxejududek.pdfIn PDF document text
    • http://sbcnepal.com/images/file/27118885599.pdfIn PDF document text
    • http://happyland-nsk.net/ckfinder/userfiles/files/44813988600.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/49397163335.pdfIn PDF document text
    • http://fulepmark.hu/nyebu/fulepmark/userfiles/file/53022281624.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/32371636887.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d9d20dd508---45542958138.pdfIn PDF document text
    • http://veszpremlizards.hu/_user/file/jomikisu.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/0b2d1e02382a2f82fddf6bcf54ccc00f/41765814158.pdfIn PDF document text
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/gejafiraw.pdfIn PDF document text
    • http://kozszemle.hu/uploads/files/noxidinanodowis.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16131678a1cd02---tokexoduwirefel.pdfIn PDF document text
    • https://stabiactiv.com/userfiles/file/73471107017.pdfIn PDF document text
    • http://medicapoland.pl/uploaded/file/lozugapud.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613387c092d78---berumazivejotidijolabe.pdfIn PDF document text
    • https://10playsolutions.com/clients/softklk/documents/_articles_/file/35222387901.pdfIn PDF document text
    • https://careersourcechipola.com/files/public/66438764677.pdfIn PDF document text
    • http://zenobiacultura.it/userfiles/file///23078205706.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/poxazapuka.pdfIn PDF document text
    • http://snap-drone.com/userfiles/file/73061574431.pdfIn PDF document text
    • http://britishcytology.org.uk/ckfinder/userfiles/files/95248864424.pdfIn 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://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_off0000da03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f21a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21A 10408 bytes
SHA-256: 7cc97c2056e7b9e869625687c5ed70da45ef58ec7bef8ec3762820760b61e617
font_02_sfnt_off000109db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DB 17052 bytes
SHA-256: 8e5dac055063c0383aba12447be2922fd692cdd3ceb82c081b59131fc42d2935