Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fc30ec954a7ff4d…

MALICIOUS

PDF

85.2 KB Created: 2021-09-16 11:55:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b619fc282cadcb184c48aea7e47590b9 SHA-1: 4a49c5c46c3e9fe103e8c2de57c5d26e7d18b16e SHA-256: 5fc30ec954a7ff4d1289afcf4225fbee6482033272bc49fb690d36e928654751
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. The 'SE_PAYMENT_REDIRECT_LURE' heuristic indicates the document attempts to trick users with fake financial instructions, a common tactic in business email compromise schemes. Numerous external URLs are present, many hosted on compromised or disposable domains, suggesting a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://queure.ru/uplcv?utm_term=battleground+mobile+india+apk+download+android PDF link annotation
    • https://burstallconrad.com/editor_files/file/bunobazojal.pdfIn PDF document text
    • http://tokyoracing.hu/userfiles/file/vesibisusogavexapovipagu.pdfIn PDF document text
    • http://tmacfashion.com/ckfinder/userfiles/files/55762148459.pdfIn PDF document text
    • http://romovi.net/sgi_userfiles/userfiles/files/85091896154.pdfIn PDF document text
    • http://grossbuch.com/upload/file/fuwitefakebudedu.pdfIn PDF document text
    • https://muachungbaohiem.com/uploads/userfiles/file/zumulinomivipuzon.pdfIn PDF document text
    • https://xn--bren-mgenwil-gcbf.ch/sites/default/files/fck-uploads/file/88539418910.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/c94df1b773c4ecd03b69bcf5ff7aba38/migivamesuferad.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/66431533785.pdfIn PDF document text
    • https://openkomm.yussfone-crm.com/userfiles/file/73142192257.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16141c2be32c1e---zesapesixilasevezuka.pdfIn PDF document text
    • http://jia-longsofa.com/uploadpic/jialong151126/files/202109042249318441.pdfIn PDF document text
    • https://zerling.eu/nico/images/files/65109518612.pdfIn PDF document text
    • http://bettaletroom.com/file_media/file_image/file/22540701033.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161407d19b0d76---8966317446.pdfIn PDF document text
    • https://comobrew.com/newsite/images/user_uploads/file/repoga.pdfIn PDF document text
    • http://krupongs.com/images/file/kufomagijavez.pdfIn PDF document text
    • http://change4best.ru/upload/file/muzanepakasejopaperedu.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/6a78790fbe5aa0ad2cdc76189c5cc03d/48975137120.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/fhfijpm2nr69k5irv1na49k2q1/37788025508.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612f46e39d3b0---43669648808.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/33742612332.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/miradekuwisideveveduwuvo.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/1b98dda35edcd9a4088d75976b8f6357/vekepejajekaserojomux.pdfIn PDF document text
    • http://cosmik-kinoteatr.ru/sadm_files/zogoxiwupuga.pdfIn PDF document text
    • http://yoshitomo-kokubunji.com/jcfiles/file/54489237693.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_off0000e34c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34C 11036 bytes
SHA-256: 5aa5c366b1da14abbf65b497bde55eb9a729275329516d161e1de4da21dc4c30
font_01_sfnt_off0000fc97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000114a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A9 19336 bytes
SHA-256: 17bdbd3bfebad7368bdd647ffd35c00112386496391cfa1c836a94c3794a26c9