Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f5678ee8a382b2e…

MALICIOUS

PDF

100.0 KB Created: 2021-07-07 22:14:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e10bb63de8907adddc1ec077cf5c5c2c SHA-1: e2961a662325051d9569c06214543084fdf3e2fb SHA-256: 6f5678ee8a382b2e6c79388a8c949bcd7ac13f6f3eeca247ac36aaa7e5870767
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and other disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish or redirect users to malicious content. The embedded links suggest a phishing or content-luring attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9371

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://sztarmedia.hu/_user/file/dokunanodemiguvera.pdf In PDF document text
    • http://goref.ru/files/file/35626430123.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c876f6e303c---dovuletoladimelujakugogiv.pdfIn PDF document text
    • http://veterinariomauracotti.it/userfiles/files/40517626239.pdfIn PDF document text
    • http://tilestone-pools.com/i/File/boxogejamisiful.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/fujixagu.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/raradiwoxuxurifudaw.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/84868107883.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16078ac0d45879---sigifujalavemigonuworaxi.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/952013bdeccf3f7a6508e49671480e1c/bopukirikinene.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/5p41oqvpt1b8smr6i77ptobrjd/5396527744.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/61990693012.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/86320139536.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/6cd1946f6cef94299e2af692a3830b59/gizudubejisamar.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16077a6721673b---82875934403.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8763750b1d---ponudejasasoxizefodew.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/8qni8qanupetsff8l2b4m78bbs/425886142.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/c46rb2uov0p49kth08cq630en5/5055798643.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1609b87e1c25f4---javaloludi.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac32922ed77---7007419480.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4bced1da4---63906910253.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607550e9c762c---dojadomaduko.pdfIn PDF document text
    • http://ceramicaartisticamarsalese.it/userfiles/files/95712655272.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/6f1fb7d65f2e7453749f4bd763e1a4f6/1455046846.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c30606882d5---52106024766.pdfIn PDF document text
    • http://cleanyachts.it/writable/public/userfiles/file/41732728073.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=snake+in+the+eagle%27s+shadow+full+moviePDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f14a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14A 17864 bytes
SHA-256: 7ac3879bf42abf201091e96c1f26a5ec71d934ebac0a437f8ad12566331d8f7b
font_01_sfnt_off00011f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13763 11152 bytes
SHA-256: 0bd6ad83d458e5cb6a307e4f1fb1f9dc4d223693c6bb9f27abc825609851b504
font_03_sfnt_off00015126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15126 17304 bytes
SHA-256: 4610ee8a00d362a26ec362822242d7616c8540ffbc07dba2109b9a05af41c1eb
font_04_sfnt_off00016ab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AB5 5792 bytes
SHA-256: 168401e35ed2953ceda5aca5e0f026ff9dca0116a55697230bff2d26e894c1ea