Malicious PDF — malware analysis report

Static analysis result for SHA-256 002c2987945a544e…

MALICIOUS

PDF

89.7 KB Created: 2021-09-03 19:10:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 50a4dc182913081fcd69a52ddfae4278 SHA-1: 8035726c2f030c02c8a1b5eab87c58989b74b6bb SHA-256: 002c2987945a544ed64338b1d09f6a4c73090b73275ed6a8ba45aabf527de58f
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to other PDF files hosted on various websites, many of which appear to be compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery through these linked documents. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a89b1719b---lesibovobaxozesen.pdf In PDF document text
    • http://compufoxmail.com/userfiles/file/bijezeromunajizufax.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/itkp8ivq4ktnnofsctv1o4it5p/pajadupororaned.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/tamegefiweberajepejeti.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/vifudugivi.pdfIn PDF document text
    • https://exlite.it/ckfinder/userfiles/files/82344667486.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160e2f29eae01c---biliravoxadevesezunil.pdfIn PDF document text
    • http://5m-tti.com/uploads/image/files/10670763682.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bceb44a7378---kaforugulevopuneganu.pdfIn PDF document text
    • http://synthecinter.com/userfiles/files/xanutigukapemilabutin.pdfIn PDF document text
    • http://unicorn-furnitures.com/d/files/seseze.pdfIn PDF document text
    • http://jlm-kg.com/uploads/file/18538349849.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/4fbd310f974fdb0388522a020c1c4e4b/17582607479.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/74072584093.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9pkuug81c39uoroojimckaslf2/zupowusote.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160a487e2cdf83---53871718506.pdfIn PDF document text
    • https://hyosungulf.com/uploads/file/88219092901.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607fdcecc26b3---zomumorekilozuzirisedefod.pdfIn PDF document text
    • https://mimpiindah2.com/contents//files/dinatotadox.pdfIn PDF document text
    • http://abwmountvernon.com/uploads/files/fudamojawerif.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///41404429725.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c58b7c322a6---96098190429.pdfIn PDF document text
    • https://aljazeerahpetroleum.ae/userfiles/files/peluxajoluderadubuzus.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/87885291054.pdfIn PDF document text
    • http://siamsnail.com/media/userfiles/files/silowi.pdfIn PDF document text
    • http://ykzn8.com/upfiles/editor/files/89918356361.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=foundation+of+educational+leadership+and+management+pdfPDF 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_off0000f3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C0 20144 bytes
SHA-256: 202014383ad26b5ba5ec32cd6f959aa7eac212dda84933a459a4c4099dcd2d84
font_01_sfnt_off00012649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12649 11144 bytes
SHA-256: 99b9d66ca59ca2dc12ffe5a085c45027e52de06f19faedc144c81ef9ec7ed612
font_02_sfnt_off00013fe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1