Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bc3969a1e058c62…

MALICIOUS

PDF

123.8 KB Created: 2021-06-09 11:48:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3d194f98e6b471c0cd92b072ca452998 SHA-1: 7901d259b6a84e70b4e5459eea00b1b6df89b563 SHA-256: 4bc3969a1e058c6246c80d729e94738d4d9f0b52223daf9e33b6d840a8b32401
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document contains numerous links pointing to compromised WordPress sites, likely serving as a link farm to distribute the malicious PDF. The presence of external URI heuristics and the compromised CMS upload link farm heuristic suggest an attempt to leverage SEO and compromised infrastructure for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ketchas.ru/uplcv?utm_term=ramraksha+marathi+pdf+download PDF link annotation
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3eaa9e839---14461172184.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16093be6414c77---47336805913.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/cb123a4fe575dfd2ded25f3a24eaab32/51489729373.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/75464005237.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089619264608---mobezedupoxivabigevijuzok.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d205162b4f---73569171820.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/19766070980.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a333df6720f---72308922153.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/91364570642.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/87257025472.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607996a272720---15773394967.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/25006539679.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a847bfc8197---nowozujaka.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b21ff48bcf0---44311773411.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/d5acc0226a396c2701fdb9d6c3ba01b5/tonalopekulu.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/0edumo1aq6o9ejtap69o48oo32/85056462759.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/52705de6ee9ee3c36242df827f6309c9/jodenumu.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071542171db7.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a8bcec26d---jerijox.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001a0a0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1A0A0 24348 bytes
SHA-256: 289401a3aa32fb03c1cd9bf919f1decbc80fba59dc4e3585f250099167ea3aeb
font_00_sfnt_off00015b96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B96 5444 bytes
SHA-256: 9168275e9bd42640b05366a5135a06a0cc1d458a91bd62a119c4b4cc294a32fc
font_01_sfnt_off00016e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E07 3772 bytes
SHA-256: b9b49a3c453c53986d7a61d4291ac5a87065d82ff96be43ef0dca6427e6dc540
font_02_sfnt_off000179ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179AB 11336 bytes
SHA-256: 68ec42b1e66904b600817388dd0bdd5a7e8e21e7f746e585b97387ebc6042740

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