Malicious PDF — malware analysis report

Static analysis result for SHA-256 29a2a829dbd50271…

MALICIOUS

PDF

74.6 KB Created: 2021-06-28 00:45:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 89540a19e7ff166a17a8e2dc63695053 SHA-1: 3588ee1ad94f439ef3c5e55a6f73e4bae126f895 SHA-256: 29a2a829dbd5027112dbbeefd6281eed1c6d074cd7e4b00b92ef0930301aab2c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting domains, indicating a link farm designed for SEO manipulation or to distribute malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple external URIs further supports a malicious intent. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 5

  • 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.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/sd5lt1cprtl1nsmnfl4bst6oum/66136528876.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b9197eed9---fepuj.pdfIn PDF document text
    • https://soltendance.com/stockages/files/zagenaxexivama.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/160eb00c343753cae0ced7dffad4ddff/44066175523.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16095717890c21---pupinunibeda.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/57bccb23a0ef292767d9ff876d1eb64c/jurirunefeda.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/oki07unkcak03nqtu78feih8if/26216469881.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab387654a60---96780947279.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/lk92kq84p9s2ugs2e5gr49u793/ketivozoxenuv.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe088a502c---pasokiwezagozumuzila.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/64794556895.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/t4agob5c7sq38g1po5hpg99fg0/bufavilasaribenof.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16080504d6885b---52137265248.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/pewep.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/ad23be2851eeadb148a5ecd295923957/4577468255.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070706dee0ac---98010197210.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/f1761eed5cf217bd8572fb5567b41524/fovov.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cebb6edd35---wazuvuzaxurumupi.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/tsaqth40tqjd13fndb2d2i4bt2/20765099757.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/14402947950.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/20241376554.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/171518991.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1608a7e71ba6fc---tofitilaku.pdfIn PDF document text
    • https://xn--faades-mtal-n9a6a.ch/ckfinder/userfiles/files/jedemufavisapepivorire.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=coco+nails+2+hackettstownPDF 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_off0000c1c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1C0 16612 bytes
SHA-256: dc8ce93856caab96cd29a64c784cd3f066d80947c73792509d11fa67b1c6569a
font_01_sfnt_off0000eceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10502 10556 bytes
SHA-256: 5d695081b45b64d211ce6482d681c961c49fe84806ff33c3bec22485210b5e7c