Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e0d1baaf823c8e0…

MALICIOUS

PDF

81.2 KB Created: 2021-09-04 12:36:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f7859e7084fcb6e5a7969ff95caabf00 SHA-1: 764e21b82870b73b1896e7c25c936be37fbce071 SHA-256: 0e0d1baaf823c8e0c114d3b4d049ba17e275a6d6be1c06b268d471de9e072c1e
196 Risk Score

Malware Insights

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

This PDF was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a payment redirection lure. The document body is heavily obfuscated, but the presence of numerous links to potentially compromised WordPress upload directories and disposable hosting suggests an attempt to host and distribute malicious content. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly indicates a business email compromise pattern, aiming to trick users into altering payment details.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://grandp.ru/userfiles/file/6000493779.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7f23ae0db---88765269239.pdf
    • http://pappteam.hu/userfiles/file/27265317053.pdf
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/iq9ldogl198sl3rbo3rvfm5l7n/46401724863.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acc783f2d1c---68340235717.pdf
    • https://ssekolkata.com/ckfinder/userfiles/files/belugijigev.pdf
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a9eabb4e4---82256163973.pdf
    • http://escuelasfutbol8.com/docs/files/nisotonexowoputovatezogi.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/87aa133be561d7e562d4d4356e085d0f/banoxopuzob.pdf
    • http://monarchiaerembolt.hu/tmp/25943514888.pdf
    • http://ks4073.com/file_media/file_image/file/82536369356.pdf
    • http://1960ihs.com/clients/e/e0/e0b58928a48036c9af8d6cfc9cffdd99/File/43913412014.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/pflmqgmfc978dqr925cejh6d83/lubafujirijeg.pdf
    • http://telekommarketing.com/firme_data/files/76762981104.pdf
    • http://espokebar.com/uploads/files/14833947190.pdf
    • http://otohondamientay.com/upload/files/gutitofofekam.pdf
    • https://hiddencliff.kr/FileData/ckfinder/files/20210721_DCD46295115066DB.pdf
    • https://ipic.vn/userfiles/file/10189428036.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/ba6fd881f1fbe58964c70ca001493de0/55839994005.pdf
    • http://minhphucvietnam.com/uploads/userfiles/file/16719686734.pdf
    • https://ajitcoatings.com/uploads/62043619332.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160aeafd35381e---durujulojedeba.pdf
    • http://kcntanduc.vn/img_duhoc/files/warola.pdf
    • http://www.scsi.coop/wp-content/plugins/super-forms/uploads/php/files/a43b936b0f49d403607621a5705c0626/rozuzuwupilelu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=ipad+pro+user+guide+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_off0000d80a.bin
b9c91d1e23a3015eda6c31f9a2665a715f1ea7caab91912f2be2be4964426183
pdf-font-stream PDF embedded font (sfnt) at offset 0xD80A 18372 bytes
font_01_sfnt_off000107ee.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x107EE 16792 bytes
font_02_sfnt_off00012005.bin
afbc35e925391c80184323b1ca1f647df1e2c21442fddb0a7e7e2c1e7298027c
pdf-font-stream PDF embedded font (sfnt) at offset 0x12005 10476 bytes