Malicious PDF — malware analysis report

Static analysis result for SHA-256 212be6bb7ecea5ae…

MALICIOUS

PDF

87.2 KB Created: 2021-10-07 10:44:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 84084177df849bd990c77b393bba3658 SHA-1: 0df6832ecbda5e3f14f14b810e330de500ce41cb SHA-256: 212be6bb7ecea5ae9f1c1e1e3e656e31a012ba6ffcda3709edf5eda84525840c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious, with specific heuristics indicating a payment redirection lure. The document contains numerous links to external PDFs hosted on various websites, some of which appear to be compromised or disposable. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect the user to malicious content, likely for phishing or financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://wjcopy.com/upload/files/1396998074.pdf In PDF document text
    • http://thsport.dk/userfiles/file/65579980754.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ac56399c5ab170f97364d2e62cfa81c8/vugabanuxowovovabopabox.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/50867538733.pdfIn PDF document text
    • https://spirit-legend-enterprises.com/webroot/editor-uploads/files/73264531136.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/34778202428.pdfIn PDF document text
    • http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/95938992715.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e049a6c809---gataruludag.pdfIn PDF document text
    • http://zhuoxinlaw.com/userfiles/file/20210910154424_707851149.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614bba41eb76b---lovezibivewudowode.pdfIn PDF document text
    • http://afslab.asia/upload/files/45529771570.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/fa5972b557d74d7c7d9fdf482ca295ed/detuvikifadixeko.pdfIn PDF document text
    • https://adtw1.elfjane.com/ckfinder/userfiles/files/kuromo.pdfIn PDF document text
    • http://tjjjsh.com/uploads/files/tasifezazatilofumupamowa.pdfIn PDF document text
    • https://podimercrm.com/img/files/92963569250.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/68190456209.pdfIn PDF document text
    • http://nincity.de/inline/file/4863461918.pdfIn PDF document text
    • https://virker-ikke.dk/files/59617564402.pdfIn PDF document text
    • http://epicridesnepal.com/files/24971729787.pdfIn PDF document text
    • http://schuetzenfest-hemeringen.de/ablage/userfiles/files/nanemidopavew.pdfIn PDF document text
    • http://rilta.net/userfiles/files/13575022777.pdfIn PDF document text
    • http://shendaoguoji.com/data/attachment/file/wetamesejusurani.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=k3g+box+office+collectionPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C6 10484 bytes
SHA-256: 6c8bf7b6c037d6ac328ccf6555cedad5a2be1e7fb13ae666ec44085ddd6241e9
font_02_sfnt_off000108c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C4 16228 bytes
SHA-256: b9305e9e9346cf4db74899361ce25544662daed70e12bcddfeafe4fba944c7ff
font_03_sfnt_off00011eb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB0 18484 bytes
SHA-256: 7f98fa7205e6652dff5cdc2d49f37a4b242318be8acafdcd884deb4e051dccab

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