Malicious PDF — malware analysis report

Static analysis result for SHA-256 2937bbb04281a45a…

MALICIOUS

PDF

86.9 KB Created: 2021-07-03 14:53:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ea46a450ed9fe5906886abc8d6cd41ed SHA-1: 911f5716b4dd87dc382a27e375db095bd71cd123 SHA-256: 2937bbb04281a45a09a4553eabcc4d74a2655f1c9c882da8ce9f35a156d4451a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, indicated by the 'SE_PASSWORD_ARCHIVE_LURE' heuristic and numerous external URLs pointing to potentially compromised WordPress sites. The document's structure and the presence of external links suggest an attempt to trick users into downloading a password-protected archive, likely containing a malicious payload. The ClamAV detection further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://crysiq.ru/uplcv?utm_term=the+norton+field+guide+to+writing+pdf+free+download
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160727eb9384a0---juvirewu.pdf
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/42653258394.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160dbb3708b39f---xutudupopibokofaxa.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f664bd0316---22542288932.pdf
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/45453587019.pdf
    • https://acryl-bg.com/userfiles/file/1664694637.pdf
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/1fc5b167872e27e57f4c5c5c5aefef2e/wumejirojijiwamiwazolufor.pdf
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/lqt2g7vpaef738eoncsmrl7p1j/1863673987.pdf
    • https://accuratesearch.com/userfiles/file/nogisijivusawijagu.pdf
    • http://agiusfuneraldirectors.com/files/file/8628933127.pdf
    • https://dacola.com/upload/files/wajilepitunopodokifusisim.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf0ee2c187---72086090398.pdf
    • http://policylic.com/uploads/files/23787201035.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d080fea217---35303471442.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/cd434b9b89c5611c2894357f14cc0287/zemesadezosano.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca18311ed2---88714984956.pdf
    • http://www.annaleehuber.com/content_files/file/7690402933.pdf
    • https://vibangnhadat.com/uploads/files/mejamalunikev.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16084e736543fb---livalitaserademarej.pdf
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/7dba12b8a909883740365680ebb36fcf/getofajekupiladivoluwefo.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/s02bhcfunctb0866lnro12epda/34863359358.pdf
    • http://tuzvedo.hu/elemek/file/6617707647.pdf
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/tirubin.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/06c6eb4a097c7549be3175a83a8b257d/dafirovamakojadojodo.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609d237046d4f---79962522047.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_off0000ebdf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDF 16792 bytes
font_01_sfnt_off000103f6.bin
a0fd545fe01cf1c7c3d57f9a1c1a2fb532e32603ad8bd2c151ef3f85c9c43bd5
pdf-font-stream PDF embedded font (sfnt) at offset 0x103F6 10760 bytes
font_02_sfnt_off00011c75.bin
6c782eaeaa2f962c957a86c45b0b61b0c5c4d521916fed2b8e731aec87660b41
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C75 18008 bytes