Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd6b2a8e9c8a2508…

MALICIOUS

PDF

90.1 KB Created: 2021-09-10 08:08:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: bca06d11aa495104eb38f88efe2e3c5e SHA-1: 80799993148a4aa1a6af7876a1b7f0841421da54 SHA-256: bd6b2a8e9c8a250820d9242f17c730d528a8965109a27fddecf185f9cef1403e
296 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1534 Credentials from Password Stores T1204.002 Malicious Link

The PDF contains multiple heuristics indicating a phishing lure, specifically requesting recovery secrets or payment redirection, and impersonating brands like Outlook. The embedded URLs point to domains associated with link farms and compromised CMS uploads, suggesting a phishing campaign. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://synerhu.ru/uplcv?utm_term=hotmail+com+au.
  • 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://synerhu.ru/uplcv?utm_term=hotmail+com+au PDF link annotation
    • http://yukamifashion.com/upload/files/jonavizu.pdfIn PDF document text
    • http://bagiez.de/userfiles/file/setewazizuxawatofurer.pdfIn PDF document text
    • http://rickgrisolia.com/userfiles/files/77232790596.pdfIn PDF document text
    • http://fairfresh.net/assets/admin/ckeditorimage/files/jopirefevunixoj.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613a7db6c3d71---dibewowibopebatibux.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/16136f9d0bd7a1---94055518521.pdfIn PDF document text
    • http://dongamold.com/fckeditor/upload_files/file/23786668051.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/31445516764.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/dipesapodasaguto.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/caa9653814651585670f709e370cf7ad/tejapidubob.pdfIn PDF document text
    • http://dubilex.com/userfiles/files/vefamidegovasuxukep.pdfIn PDF document text
    • https://samsunyapi.com/userfiles/files/91603055960.pdfIn PDF document text
    • http://linhkienhunganh.vn/luutru/files/muriwomazapomoxixunaxo.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/wagutelabagezokakoxi.pdfIn PDF document text
    • http://sushinamu.com/uploads/files/81229136597.pdfIn PDF document text
    • https://jingchengs.com/jingchengs/ckfinder/files/20210905184708.pdfIn PDF document text
    • http://nelly-design.ru/upload/files/kewupaladoxoxukenav.pdfIn PDF document text
    • http://hosungtour.net/FileData/ckfinder/files/20210907_8597049CFCF7EAF2.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/52034223746.pdfIn PDF document text
    • http://rovitek.com/userfiles/file/bodijizurudafizedini.pdfIn PDF document text
    • https://megacook.pt/site/upload/file/tajug.pdfIn PDF document text
    • http://avesta-hmora.boj.se/uploads/userfiles/files/donapepazasisinabikosetir.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16138d3db57a6c---1220146976.pdfIn PDF document text
    • http://lovesushiscv.com/uploads/files/zikexabo.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_off0000fd17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD17 9976 bytes
SHA-256: 27d5c9fadc5bb821465e2320ec9ac85aab5e060ca6ffa737de4fdb1952977095
font_01_sfnt_off0001132c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1132C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B3E 18452 bytes
SHA-256: 25e99bc572eadadc03c229b929d3fb69284d6cf0d38d0bbca0f8a75ff1bafb8f

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