Malicious PDF — malware analysis report

Static analysis result for SHA-256 02247aa6b88c69bd…

MALICIOUS

PDF

84.0 KB Created: 2021-09-03 07:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 083d6b14813de4031c4dc9abf8932164 SHA-1: d84033ede647581ed04a047380192817119754ea SHA-256: 02247aa6b88c69bd6b8b5424d112c7a6a38be977673366b3ffa3095326e4dc64
204 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a credential phishing campaign. It impersonates Apple and directs users to download a PDF from a compromised WordPress site, likely to steal credentials. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=diatonic+intervals+worksheet.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/f2769f70daa27c607914b562069ff0be/sexalobolituxig.pdf In PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075cb26e2313---80795243058.pdfIn PDF document text
    • http://vinabomi.com/uploads/userfiles/file/totapebutaposefet.pdfIn PDF document text
    • http://mopi.eu/ckfinder/userfiles/files/61847887676.pdfIn PDF document text
    • http://citra.cl/userfiles/file/55500488084.pdfIn PDF document text
    • http://phonphangschool.com/upload/files/gavudofijoxenosegelibi.pdfIn PDF document text
    • http://apcmagon.com/userfiles/dediwikubisosalegemek.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160842a01effed---gojemasijopiposo.pdfIn PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081391b00ef8---64559119851.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/zipolavulodufakovudog.pdfIn PDF document text
    • http://www.s4b.nl/upload/files/daxapojuk.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/gajamenutexelunobavofu.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b92bcadd7---domobizoborox.pdfIn PDF document text
    • http://xiangzhuan.tw/upload/files/javavud.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/202162633673095.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/g31g40tva2ce48pah040oii1if/12922326787.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607fab91338bf---pemodopegijifikoka.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b4fdfe1f164---boporubigu.pdfIn PDF document text
    • http://podolsk-kondicionery.ru/upload_picture/file/94120886756.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/rhhsfl0tv72mihb74kml3llovp/kujuw.pdfIn PDF document text
    • https://marljivo.hr/UserFiles/files/43211095029.pdfIn PDF document text
    • http://capesociety.ca/uploads/files/24328430025.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fe35ad869cb8a0d97a48363933460580/54685738177.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160785ba0a4ed3---zaketibegifedutik.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/bibanewavo.pdfIn PDF document text
    • http://flynewsletter.com/uploads/file/33548114703.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=diatonic+intervals+worksheetPDF link annotation
    • 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_off0000e214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE214 18852 bytes
SHA-256: 1ecd502d9037d91d5f7e7139e0997ff793c8196f784ac550239de74df9df7583
font_01_sfnt_off000111f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F5 10572 bytes
SHA-256: 810fa71ec5a91bb176d412fed931e340747e4070aa8c445fd719c1b9643b209b
font_02_sfnt_off00012a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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