Malicious PDF — malware analysis report

Static analysis result for SHA-256 149cfc1d144d8b1d…

MALICIOUS

PDF

92.5 KB Created: 2021-07-22 18:59:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 56d734fc67ea2d2a43d92cbb0604d0fa SHA-1: cc7c1b8c85c4d41b521189e8ce3f75479230da9b SHA-256: 149cfc1d144d8b1d88915bb91d8bc108ae5ffb9b07ee655131716e9b8a7be0ce
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as malicious, including a machine learning classifier and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The document contains numerous links pointing to potentially compromised websites or disposable hosting, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm heuristics strongly suggest an intent to exploit users via external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://jerseyshorepirates.com/userfiles/files/kufexum.pdf In PDF document text
    • http://aucoindeshalles.com/menu/file/wilekapejosiwalobaz.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/sfkqj7d560cs2l36i333thg4v0/guxemaribekebarov.pdfIn PDF document text
    • http://indel.sk/userfiles/file/66770140873.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/747ef33282f4a28a2719309c22eaf4d0/24169180378.pdfIn PDF document text
    • http://j-club.eu/userfiles/file/wexelumemuselogabepuv.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/jaganivoteribipexowuku.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093fa9946c84---82714169289.pdfIn PDF document text
    • http://4bx.pl/public/file/25341652990.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfe5ef29f1---33811601141.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090a7a607552---zifesuvegatonexidad.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/b39e4d54707433f1a8d8d374580cad20/89330429997.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7b01c0207---jajubozeliridubuwemixur.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/j3a0vg5bbr5lq5f083353lrdi7/fireroruxeburesebob.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a41fbaa72---zipafimero.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16075099a0fde7---36910276593.pdfIn PDF document text
    • http://cmepta.com/clients/7/74/74ea2f63c40943e6497cbf70acaf7c81/File/laxosarenuwikefexotaroku.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/kucjvqtr6mnivrrl0jmn44almb/kuzesugelozumiwefo.pdfIn PDF document text
    • http://ruoumoc.com/upload/files/43573497659.pdfIn PDF document text
    • http://sequirk.ie/userfiles/file/fovokafuzonawamizalorux.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/15563ace961e8542bb6724c753b50113/74062397040.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075faf7e34fd---gowuritixitolasolulawuri.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/eace69d40875e5add73d1ddd9a8a3d45/79660064143.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/jejurotezoludigi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=backpatching+in+compiler+design+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_off0001023e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023E 18868 bytes
SHA-256: fe54fa84e1ee055c60ad0a7b0ae070d99bee39f26db0ae43736425f2f2a325b0
font_01_sfnt_off000132b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014acb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14ACB 11212 bytes
SHA-256: 5abe98031f95824593327c330b3386553320636720b378b888b49127292b1912

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