Malicious PDF — malware analysis report

Static analysis result for SHA-256 63ca2567aea5b2de…

MALICIOUS

PDF

79.5 KB Created: 2021-09-17 02:07:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2b475398d9b3868aae539e9cfef329b5 SHA-1: 77e40f7571d428dfb163e1242bd7c79f3cb61f8c SHA-256: 63ca2567aea5b2de112a177cda8c31a644d1af3b3dfe452534f2f0c28150be8a
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to link farms or disposable hosting, indicating a phishing or scam attempt. The 'SE_CALLBACK_LURE' heuristic further suggests a phishing context, likely aiming to trick users into visiting a malicious URL. ClamAV detection and ML classification confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://infrive.ru/uplcv?utm_term=game+pubg+free+play PDF link annotation
    • https://juhaszautovill.hu/userfiles/file/42491363461.pdfIn PDF document text
    • https://pcparts.fr/ckfinder/userfiles/files/fovobifipebusazew.pdfIn PDF document text
    • http://dirpub.org/editor/ckfinder/userfiles/files/16453567430.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/92046561564.pdfIn PDF document text
    • http://chayka-svg.ru/files/82795663701.pdfIn PDF document text
    • https://happy-playground.gr/uploads/_uploads/files/12702612146.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613a6f42469cd---31203235160.pdfIn PDF document text
    • http://factblogs.com/uploaded_files/userfiles/files/12039993560.pdfIn PDF document text
    • https://yk-tech.com.tw/ckfinder/uploads/ckfiles/files/tupedoxinefepufibilaxifod.pdfIn PDF document text
    • http://ketoanaca.com/uploads/image/files/83264310578.pdfIn PDF document text
    • http://hiroshima-teishaku.com/userfiles/file/zisavutafidusute.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/17458668961.pdfIn PDF document text
    • https://waxparadise.pl/userfiles/file/nusivitizopuzoto.pdfIn PDF document text
    • http://texinpack.com/uploadfile/file///2021091615583119.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/8dtrmva9qiqgmgr74428o5t712/komosasokoderuj.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/safefasidosulunigofidekiw.pdfIn PDF document text
    • http://balmybnb.com/t/tutorfirm/uploads/ck/files/jivanesap.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/85808904038.pdfIn PDF document text
    • http://revize-elektro.info/UserFiles/File/wejegu.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/gopolesutejeb.pdfIn PDF document text
    • http://dglytbt.com/upfolder/e/files/20210913045827.pdfIn PDF document text
    • http://ilsungwarehouse.com/userData/ebizro_board/file/96015430806.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_off0000d598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD598 10512 bytes
SHA-256: 27ce5900a2d7180e5f25d8a40fc41dda19b365db905a84d3b0c3900c7a423867
font_01_sfnt_off0000ed4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4C 16884 bytes
SHA-256: 38d73763bd6211d3e1d69471e30fa4af69f9c9bd38c6b06c9cffe36a8e119d19
font_02_sfnt_off000118d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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