Malicious PDF — malware analysis report

Static analysis result for SHA-256 29df2a0bd96210fd…

MALICIOUS

PDF

109.3 KB Created: 2021-07-03 01:04:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9e084c68c520e3a2fb508e4bb0bf7dff SHA-1: cd688b5d11d8e6821fc62415a9a8fbc6ba66e3f6 SHA-256: 29df2a0bd96210fd8d6c3cfe8e38ef5c2785e4d1e23ec7ab349bc2ddc56beda8
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of external URI heuristics further supports the attack pattern of directing users to external, potentially compromised, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9729

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cihangirhotel.com/upload/ckfinder/files/zovulodunomejeboduwa.pdf In PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16224626113702.pdfIn PDF document text
    • https://nestsearch.in/admin/uploads/file/51410721833.pdfIn PDF document text
    • https://sp-pir.ru/wp-content/plugins/super-forms/uploads/php/files/46d238c68c2d38e0b45016210de2f555/3180069244.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/aaee360f5e3b3f02a4086fa7fe2efc25/66597722715.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/a309fab963f3068b8cd5d6a3ce433ab9/zokujenamat.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/9690212975.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/a09adfa1b7ef7749a90f470dcdb07515/daviba.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb65f99eff---kituwifipoz.pdfIn PDF document text
    • https://ebooksweb.net/files/file/dizofuwetukajipukufitazi.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/97357039023.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/nevojuvebewaputuxenivap.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/70274915236.pdfIn PDF document text
    • https://magatek.com/documents/file/79417532342.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/6bec4551be54fe796139fbcf79329817/86702265358.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/t050pkh4fslfe2ahua0e335h06/2374670075.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b78ec4d868---47094124008.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/kd1n1vhtukedende5qku4hab8r/75720209643.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d02b8a8f15---19109883726.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3fa6482b7---lewojopobetepifupixi.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/10b2469ac29d647c7186b979a3e76ed3/43078580638.pdfIn PDF document text
    • https://nestaerospace.com/uploads/file/34912766227.pdfIn PDF document text
    • http://fritz-fahrlaender.ch/download/giwukonazuvokaraxebilunil.pdfIn PDF document text
    • http://tecsun-moscow.ru/docs/file/86446492358.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b745cd1aee1---vimuvafe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=mhw+best+charmsPDF 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_off0001208d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1208D 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_01_sfnt_off000135d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135D3 10352 bytes
SHA-256: f2fea9e19625e66a1f3a1f57c4691bfeb09dab7cbe506a84acfd94acf06864cc
font_02_sfnt_off00014d50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D50 18504 bytes
SHA-256: ad2070cf8a80f0a0b304609c57d8a9134d9a42c4bfefefb713b5b78027e6a21d
font_03_sfnt_off00017da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off000195b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x195B3 4636 bytes
SHA-256: aaa7e6ede50a802b31d251c372465e97eb00e0301567e488f0e427f39536dcda

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