Malicious PDF — malware analysis report

Static analysis result for SHA-256 0258d2286e314a4a…

MALICIOUS

PDF

89.7 KB Created: 2021-06-30 10:26:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8fbede3d39f20ce623553b7d40479f1a SHA-1: 57bc4189d0138ec4991b7d274bc4a78829347aca SHA-256: 0258d2286e314a4a362e9ba2c1b1cdc091bbe71c5be1ca4724a012606a7fafd1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting sites, indicative of a phishing or scam lure. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly suggests the document is designed to trick users into changing payment details, a common tactic in business email compromise. No scripts were extracted, but the presence of numerous external links and the ML classifier's high confidence score support the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://n-zvuk.ru/upload/file/gosebi.pdf
    • https://avenue102.com/uploads/file/5002921478.pdf
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/639adf69dcb55f636b3537f8653d1ee6/3078524495.pdf
    • http://condosworld.com/abisol1/userfiles/files/kutewemebe.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/cuma2hrlr0auv1f2vhh79pm0eo/54944819777.pdf
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/2235186044.pdf
    • http://baaningdoi.com/file_media/file_image/file/7817112472.pdf
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b35e466dd---2042692586.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608deb7808fe6---39088805272.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/aae9601638dcf98350a86f0f1d9f4c39/862400846.pdf
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/5b6727dc9dd782a2373ce765d8b2b566/85648541686.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/f4dcd78f6f604357b775707122e7c87f/37989314100.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb24fa447d---wejare.pdf
    • https://jetaime-shop.com/files/13578051885.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c061871da---54345076050.pdf
    • https://edu-mate.kr/_UploadFile/Images/file/96451124168.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a20a4a6ee---41070154136.pdf
    • https://bdcomunicazione.it/file/tekunugov.pdf
    • http://lctrading-gmbh.com/ckfinder/userfiles/files/gopunatetuliteded.pdf
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/8995dtm0h83ncfeon3clm5ckek/77044071118.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc0e73d02f---pevesuxubutarero.pdf
    • http://gocreate.termall.pl/upload/fck/file/sodipoxoke.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5b95de984---miwev.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=after+you+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea9d.bin
e5925f9b95aa439bc51de3f856ef14c7880c5ba0147f8cc0666c4e81c8476668
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9D 10116 bytes
font_01_sfnt_off0001015a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1015A 16792 bytes
font_02_sfnt_off0001196c.bin
9e3fcafbc5fe46d70199a4d648a00113f87c4eed488493c00b747ca174662bbf
pdf-font-stream PDF embedded font (sfnt) at offset 0x1196C 32332 bytes