Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fd04cdc14022c4f…

MALICIOUS

PDF

71.1 KB Created: 2021-09-03 02:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 357635430ea24fe6af8dd1a1c96adf6a SHA-1: c389afe1ed0625293e01c977725c8c3b1d6a5e78 SHA-256: 1fd04cdc14022c4fa3b14f2f819134943c9679ec07085a3ace40ab33f5db4268
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by an ML classifier. It contains numerous links pointing to compromised WordPress sites, suggesting it functions as a link farm designed to distribute malicious content or facilitate phishing. No scripts were extracted, but the presence of embedded URLs and the link farm structure indicates a likely intent to redirect users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca51108f79---sezigubudakozokinalanuper.pdf In PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e068f2b72---74142902336.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e5f6373d6fb---87138375682.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/46daa97e04b569a1df9b3b6cbfd45dd3/6893961432.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/16096966214f23---45024114469.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609612b131f15---94310567770.pdfIn PDF document text
    • http://rhodeislandalpha.com/clients/56223/File/liseri.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/0ab0c90482c74bfed74c7a75bd72a00d/rulakofoxolevukej.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/t33jjoq7aur4b6n46vnr34sfte/rofamugexikulutijekit.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/ada02ildtb1k559ok7gj10v2mb/mezokinutuw.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/nerovupurumerate.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/2sm5ff50jc0k7fd9erfsbukj04/xabivosorukipadez.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/68871632871.pdfIn PDF document text
    • http://wenxuezj.com/images/File/zutinakagafuduv.pdfIn PDF document text
    • http://sunarfactory.com/userfiles/files/jokikotipejuwakotiz.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/slqjuicl3mbtofng41rhl109it/karotosuw.pdfIn PDF document text
    • http://midlandhigh65.com/clients/6/68/682e31fde28f8c6bff7ebba57332ef5f/File/bugujavanarutiwogigoxudik.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160885bed4c6d1---mutafunave.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16120da1889fce---31226064204.pdfIn PDF document text
    • http://markone-tools.com/upload/files/zagekadigazukud.pdfIn PDF document text
    • https://euro-commerce.bg/files/46357157916.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/0cvn1lic4ai2j1578hvku2mtcg/84003010383.pdfIn PDF document text
    • http://hillandbrownfamily.com/clients/76964/File/35951261526.pdfIn PDF document text
    • http://quincy.pl/ckfinder/userfiles/files/65940700593.pdfIn PDF document text
    • http://www.singchai.co.th/ckfinder/userfiles/files/lumukubojoworesawa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=octopirox+bula+pdfPDF 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_off0000b780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB780 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cf97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF97 10576 bytes
SHA-256: 4286786261e38064e686448c321405bb1d650284d9b2848fa946af54a83413e0
font_02_sfnt_off0000e79f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79F 15028 bytes
SHA-256: 545de290a58f04dd6688cea7a06ccafc3518b1ea162d274ce06966c0a6229a0b

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