Malicious PDF — malware analysis report

Static analysis result for SHA-256 86270de165fa3d57…

MALICIOUS

PDF

78.4 KB Created: 2021-09-01 17:22:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c5e618bceed9b142030d99adee55aa71 SHA-1: dbb6a4295d4ee8cbe277cb7b72ee9bb37bfa6f7b SHA-256: 86270de165fa3d57501600227e7c9513f4041f02feae647c78acad7ed114a53e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The 'SE_PAYMENT_REDIRECT_LURE' heuristic indicates the document's content likely mimics financial transaction instructions to deceive users. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with exploitation attempts, potentially leading to further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 https://catamma.ru/uplcv?utm_term=how+to+turn+off+auto+renew+for+ps+plus PDF link annotation
    • https://mlbcsimleague.com/ckfinder/userfiles/files/resono.pdfIn PDF document text
    • http://jn-zhsc.com/upload/zibadabimekodedediw.pdfIn PDF document text
    • http://teewer.mn/ckfinder/userfiles/files/80020960610.pdfIn PDF document text
    • https://nstoplana.rs/ckfinder/userfiles/files/77951006588.pdfIn PDF document text
    • http://aristosaigonhotel.com/uploads/files/82952306285.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/vonevexiwanuwipixuju.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/48045536742.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/f5467dcf68bd961ca70195221cf3ccf9/42002385856.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1611dfd714f1dd---29277866350.pdfIn PDF document text
    • http://alumcity.ru/userfiles/file/mogagimeje.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/09d322d713f82c702154b0533479b966/xeguduwukuwife.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611cd19cbe42a---xepusozuzidelovu.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/47d6b3dce9328be6b802f072a79c330b/45237089755.pdfIn PDF document text
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kijasulase.pdfIn PDF document text
    • https://argekaucuk.com/nbg/upload/files/fivivanopolaru.pdfIn PDF document text
    • https://kenadong.com/contents//files/gonirawirizejiditiv.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/kkqpduj1ah3gqq6bpn6fbe8756/fisujojiraguw.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070f5e15fd79---93461861332.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2902d0f4b7---xepitasagodikaxavudem.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/60057547145.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/139ac5280f64d0c1e849742006f49ddd/gemizaxuxaponifesoluxarod.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e082b5b1f---92281282044.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_off0000cb32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB32 10436 bytes
SHA-256: 7781b4d7ad356c7870a6f47ea8e4d395713ab7a371c820f5420ab6b5598ade28
font_01_sfnt_off0000e309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE309 17744 bytes
SHA-256: bca327c9b04b7f378290e143b86a3823bd1b0452870f277cbc1a5e5da22c9266
font_02_sfnt_off0001119d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1119D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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