Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc693e8b11ab7db4…

MALICIOUS

PDF

80.6 KB Created: 2021-06-29 06:30:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ace2fd8ddecfedf6e5a82209036f6228 SHA-1: 5093450f10a44536a9ec8c990b2f20f3f02657ef SHA-256: cc693e8b11ab7db42688a0b7bbef7d2e3db2cc4f32317b2c6b3f0a2cdcec7400
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised CMS upload directories, a common technique for hosting malicious files. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ajitcoatings.com/uploads/xavinilin.pdf
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609855deb519d---koxokitowotepifumajukel.pdf
    • https://fibaquitaine.fr/cebatrama/userfiles/files/77719379674.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160747ab9938aa---39457484186.pdf
    • http://momsystem.ru/public/file/jusobidugasolaru.pdf
    • https://thegioibaobicarton.com/Images_upload/files/voxud.pdf
    • http://mispuntossaga.com/campannas/file/xujegadukulipibavug.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/429734e67794b30a66440ceed75cf533/ratitebiwanudinera.pdf
    • https://mclarenquartz.in/ci/userfiles/files/lekabujapevopev.pdf
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/0a8b95350179d68baa035afbd1442237/gowopesi.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ab484fead---kolugozu.pdf
    • https://meesens.be/KrMee/Tekstverwerker/62615991855.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097b7c714d90---72627055011.pdf
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/bpnocus0c3j4114n9eo0oohfdk/83568329613.pdf
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/918da1b93a560f0f74b018805d0ed626/59971525297.pdf
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a18d54af43e---pokovezibajup.pdf
    • http://icsbc.ru/fuploader//file/76340601230.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/dc1bf0ee493559160ea0d12b3b89c288/mijav.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc2d2465c1---86864091921.pdf
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/064861c28d92d01763a9934fa1a8386d/30682924977.pdf
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/4a878efd81ff3734bed0ca6c700c2709/dutoxejetopenif.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea5484fd34---xegarikepepudafuloripogu.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/b0d3cfee940a4076cd8774db320ad3c4/73716539846.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f688fad821---56561574952.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=manage+expectations+synonym
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5e4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E4 16792 bytes
font_01_sfnt_off0000edf6.bin
1da99a1552eb504f405afb85e0b16089ac7913084c67c6318d6afa46cf76ba1e
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF6 17800 bytes
font_02_sfnt_off00011c0f.bin
eb0b8fda894cf0227d6959773fd91a954d02e781a6924fed1ccbbe951a3643b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0F 10780 bytes