Malicious PDF — malware analysis report

Static analysis result for SHA-256 72f3487394f6c9eb…

MALICIOUS

PDF

88.6 KB Created: 2021-07-15 18:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 93573c8d91699f761a39d633c6f20080 SHA-1: 65566394008afc181d6c88fa315b123f3afd8881 SHA-256: 72f3487394f6c9ebcdf0cdf8c8a75658407a2a4753d600757bfd50712e97a042
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress installations and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the overall structure point towards a phishing or malware distribution campaign.

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://synerhu.ru/uplcv?utm_term=point+of+reckoning PDF link annotation
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b286bc25a13---16955056046.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/b0913d8f50ca0be707ee1c1d27b78a7c/xifazegoz.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/56893061198.pdfIn PDF document text
    • http://kutyasturak.hu/images/files/rexetotukizexi.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a17ed90ce53---91576717743.pdfIn PDF document text
    • https://puppometalli.eu/file/gufog.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/nujolefekevojupejadotemo.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16094869d5397f---89394339877.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee4a4224e6a---75305168909.pdfIn PDF document text
    • http://xn--l3cbpp3gh4a5g5c.com/userfiles/files/kasovapivisafegekuverelim.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/3827033c19c318be8b5fc17a3d54d70f/8823497465.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d052a30cb9---paluxivan.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fb43320f6ae7347d12862652c0f481a6/lutonewani.pdfIn PDF document text
    • https://kalitelivideoizle.com/resimler/files/86359501589.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4fcdaedd81---20129271903.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16098ac95de653---defanufulix.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/timosenasi.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/vunjjos69faqo3lbuiab0imff6/70621020974.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/76026652226.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16093a519694a7---55879342210.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9668806984---beruramudaxidegubixofak.pdfIn PDF document text
    • http://www.adarshvidhyasankul.org/userfilesfile/bofanigovo.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/15941999193.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160895906cb9ff---39064964858.pdfIn 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://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_off0000f800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF800 17568 bytes
SHA-256: 1005eb2c02a8e7f7004d3c73f6722831340a4507e3cb008972bc2e8c879e7fbf
font_01_sfnt_off0001266d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1266D 10228 bytes
SHA-256: 0d7fcd48946526057674ab66775f4c5d5689519b23e199368d9bc99927339948
font_02_sfnt_off00013d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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