Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcd2c3a436a30bd5…

MALICIOUS

PDF

67.8 KB Created: 2021-09-28 04:27:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: af21262e4d635455ad4ceadcd98b154a SHA-1: 80d304d30f7c5ba6e389294abd2b14353ed285b7 SHA-256: bcd2c3a436a30bd5d3591b15941631f079ba77b055e9786889d496828e90d256
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains a link farm with numerous URLs pointing to compromised WordPress upload directories and other disposable hosting, suggesting a phishing or redirection scheme. No scripts were extracted, but the presence of multiple external URIs and the overall structure strongly suggest it's designed to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/b86sflp3jhrj0ogkmtqob5dn3n/83235118199.pdf In PDF document text
    • https://tybistanbul.org/resimler/files/vugul.pdfIn PDF document text
    • http://cieplej.pl/imgturysta/file/53995448002.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/21074132175.pdfIn PDF document text
    • http://smenergy.kr/uploaded/file/168039091461334ac25d95e.pdfIn PDF document text
    • http://traiteurluc.com/userfiles/file/fobogasazibe.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/433d9ad5177804d3736ccb65bd59e6bb/64124427455.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/jebapikudasesajikosu.pdfIn PDF document text
    • https://asiahealthcaredentalcentre.com/ckfinder/userfiles/files/vejibesujovegotesaxife.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/2e1f966f8b145bd85b001630b5806494/4262646881.pdfIn PDF document text
    • http://boschvietnam.vn/files/usersfiles/files/benifekukuw.pdfIn PDF document text
    • https://loctra.net/userfiles/file/tozapabigatadixunowe.pdfIn PDF document text
    • https://pristineleather.com/userfiles/file/juvojamebejojawolajonamin.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16146fbf480bda---44520515302.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c77885e351---jawisejiranigijijukim.pdfIn PDF document text
    • http://precisao.org/files/files/24135553580.pdfIn PDF document text
    • http://lexuspolymers.com/assets/ckfinder/userfiles/files/25850886927.pdfIn PDF document text
    • http://thenext.pk/userfiles/files/43635057352.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/zimefow.pdfIn PDF document text
    • http://giovanninociti.com/userfiles/files/34584949476.pdfIn PDF document text
    • https://pasifikendustriyel.com/userfiles/file/82703328740.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/21678547888.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=android+intent+servicePDF 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_off0000ada2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c5b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5B4 14816 bytes
SHA-256: 8d401a49736b068de17a5bfeb465030a67df93d74846c9b4ec702e8018ceb396
font_02_sfnt_off0000eb03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB03 10200 bytes
SHA-256: aaf60dc7ec79dce03c4b702d28c5731bacee8c38dfa27fe73c448d19a71a365d