Malicious PDF — malware analysis report

Static analysis result for SHA-256 71c9ce3c78001682…

MALICIOUS

PDF

80.5 KB Created: 2021-09-06 20:13:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 57e7352475bb0e0caced0caf9953b471 SHA-1: 0161596290b6a15bc9c7d2767c30bada3af33acd SHA-256: 71c9ce3c7800168202f060eadd034c26ad80a1abea6d996d31097a63e1df401b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure related to payment redirection, a common tactic in business email compromise attacks. It also hosts numerous links to potentially compromised websites, suggesting an attempt to distribute further malicious content or phish for credentials. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent, likely involving the exploitation of PDF viewers or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607086dd2a7a2---95642448379.pdf In PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/3e5b20f9b3f496b808e177f4fbda3ad6/98588187123.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/43344763491.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611b16fa1888b---maseximezinisixodemap.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/gidebovuvodamuzugopamuse.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae909b8e22b---49092844007.pdfIn PDF document text
    • http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/28744231024.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/797784cabead59f1467a9689749d7749/lonajabinokonufisek.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/ed9f80d32fc9b89ce1e8ff6e2ade1b93/77503600593.pdfIn PDF document text
    • http://aceranalitik.com/ckfinder/userfiles/files/gagufolejozagozujo.pdfIn PDF document text
    • https://ginniglobal.com/uploads/file/43138389287.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/6d6ceb9a1739cb1c2b9da7605d4df428/pelofexowogidukotufedom.pdfIn PDF document text
    • https://wineuniverse.us/userfiles/file/fifibefokolopedoma.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160c986a6e2a87---bunap.pdfIn PDF document text
    • https://dacola.com/upload/files/38193653114.pdfIn PDF document text
    • https://giant-nano.com/app/webroot/userfiles/files/65328476942.pdfIn PDF document text
    • http://adirondackseafood.com/ckfinder/userfiles/files/63338539367.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/s7o37njiq7a8rl1b86dreoq19t/60250852005.pdfIn PDF document text
    • http://graviroz.hu/ckfinder/userfiles/files/98389689040.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/5sbt1tr2kedrta9fgvq5qvo6jh/sadegeseseka.pdfIn PDF document text
    • https://bunianco.com/other_files/File/50253078638.pdfIn PDF document text
    • http://jar-ted.pl/file/80826233764.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/82789d50d94bb9ef055845d2e031e832/99656373257.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=induction+process+in+hrm+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_off0000d7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BC 17156 bytes
SHA-256: e0efe3b5963f743f0b62b5ac4d5eb48ccbb699703f88df9fb06141fe44840bad
font_01_sfnt_off0001042e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1042E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C45 10728 bytes
SHA-256: d00197483123a8b41aebcff8c770661402405dd3528e50d43f4ccbd1def44825

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