Malicious PDF — malware analysis report

Static analysis result for SHA-256 faa801c6049827f1…

MALICIOUS

PDF

87.4 KB Created: 2021-07-01 09:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 7c61e59f54f9f704f719db17c9d8d13b SHA-1: 1c718e0354bcafb5cfbf3311d3bcac2a69390e08 SHA-256: faa801c6049827f1afa1d0678b5ac208e01268718c65fe50baa1a22bda310a91
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://ecowaytechnologies.com/ckfinder/userfiles/files/59758192923.pdf In PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160799afac46e4---25532183476.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/37a014fdd00277818c570462bda23a72/32942494484.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/e398dssuv2367fq2mj50pvq9vl/75218236656.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/6d755dfccec3d569e0f1d4fd0169f197/lidojeme.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/62142227738.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/xibevigax.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1609641ddb4aa3---fetekaxafidiju.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/pikubugepirujumugonepu.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/luwotosovolenorajivefad.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/dotuseziwawogazekuxuku.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a52541a084a---44713009090.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160739af0075db---81745428399.pdfIn PDF document text
    • http://clarkhigh72.com/clients/3/34/34275c7d49a174b5f6cf03bf5966da6c/File/sediji.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/uk265fcb5jn0d90arg9c0mggt2/jogilodujufatemojadot.pdfIn PDF document text
    • https://thinkhigh-tech.com/d/files/5911720371.pdfIn PDF document text
    • http://www.oiseaubleu-promo.fr/userfiles/file/tabuv.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/14e04174ee02732d23f11c8f6ba9d133/68106368552.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16080cb1818a5a---86006828326.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8db1775186---rijud.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ae8b37a27---89448206881.pdfIn PDF document text
    • http://sirmamedia.com/ckfinder/userfiles/files/49961080772.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/87373138369.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160754da15208a---fojufelexapatuberod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=male+heartthrobs+of+the+70sPDF 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_off0000f391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF391 10420 bytes
SHA-256: 817d0d5fbf464465a706e8e65f4b63b8ef2ba72eeefa7c0f1be16bc54f687b3e
font_01_sfnt_off00010b62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B62 17192 bytes
SHA-256: 6aae90e5f621da3a7c80211e16264c3a55696dcb62d20d35c7b30b253c093e16
font_02_sfnt_off00013836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13836 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1