Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b5b340aaef20aa6…

MALICIOUS

PDF

84.2 KB Created: 2021-09-04 07:57:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ddd1d1b4a9ddf5000a15d06c4c17ded6 SHA-1: 02ee41b7bdfaea17b4c149cdf0896ca8a1741a95 SHA-256: 4b5b340aaef20aa6bcaf4a84882c6c78bbe593903af15afa03af620063f38612
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://garglob.ru/uplcv?utm_term=tire+forensic+investigation+pdf PDF link annotation
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/62006709009.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d5d9e13e0---nasalugi.pdfIn PDF document text
    • https://eslms.com/userfiles/file/16815360516.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160705e8b2eb20---makurokenozolekojux.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/0edumo1aq6o9ejtap69o48oo32/85056462759.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/62ac494e5it7hnesq3cred66ld/lawufetaderosen.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/2f6908f7f609722710e2609fecce7353/pikapem.pdfIn PDF document text
    • https://blugarden.eu/file/5800286058.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/n17s3fss06g2i72r2tfmvqgjk3/sozuvuvejidonugez.pdfIn PDF document text
    • https://avayemehr-carpet.ir/data/file/83695169058.pdfIn PDF document text
    • https://zmiz.hr/userfiles/file/2808420406.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/sudunudogamofavesokat.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/liruruvoziwor.pdfIn PDF document text
    • http://domplus.su/userfiles/files/96711801271.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/ecf1a6ee4583d8de29da65bcd8d0ad07/relepudadowegijoga.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/nusijuzopusafekerosulez.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/9c4ca46da54e1e8a929f8ecfa1094559/pumasuwegagu.pdfIn PDF document text
    • http://scuderieverdina.it/scuderia/userfiles/file/61145312774.pdfIn PDF document text
    • https://aiwatopup.com/ckfinder/userfiles/files/80911417268.pdfIn PDF document text
    • https://turkihale.com/userfiles/file/rexegowowigetipuk.pdfIn PDF document text
    • http://s2ipower.com/survey/userfiles/files/57559938450.pdfIn PDF document text
    • https://troypin.com/calisma2/files/uploads/26957805012.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/62536775799.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_off0000e25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25D 18436 bytes
SHA-256: b97d78cceb60425298a9c2332a5c7b140ce1a3ac5b1b2c1305ea9d74f45889ab
font_01_sfnt_off000111c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C2 10776 bytes
SHA-256: c4a519e960735241371d17792acd117aedd31e39e3c8111d2840f45a9a2db6f1
font_02_sfnt_off00012a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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