Malicious PDF — malware analysis report

Static analysis result for SHA-256 1034ebfb58564f3f…

MALICIOUS

PDF

79.9 KB Created: 2021-09-01 07:09:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 606b2bbd22439b254bcb9d326e12fd31 SHA-1: beb576727389b9d38f914acaf83ae0d0d2438248 SHA-256: 1034ebfb58564f3fd2b1846bd6e3c4ed887239e56146e5bf026972c6ef9eb598
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and link farm indicate it's likely used as a lure to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/12cl8if0tsjqlqed4h2hipic6a/63328463610.pdf In PDF document text
    • http://pivotal-technologies.com/userfiles/file/rutim.pdfIn PDF document text
    • http://yuha.be/_files/file/robodakosagajaditewege.pdfIn PDF document text
    • https://go2germany.ru/files/file/wijixujereni.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eca19f1646---46164938445.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160e87e2c1b345---puvik.pdfIn PDF document text
    • http://airholic.com/UpFiles/WebEditorFiles/file/94899593035.pdfIn PDF document text
    • http://xnucleus.com/members//member_images/files/bizaruwasa.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/puvulasonumagedogog.pdfIn PDF document text
    • http://vinhomeshaiphong.net/app/webroot/img/files/15619563999.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/21258331636.pdfIn PDF document text
    • https://mollis.rs//files/pipupo.pdfIn PDF document text
    • http://thietbiotovn.com/Images_upload/files/54447587019.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/xokiref.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/zerelideledig.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202105211111.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/85b8d8d27163594dbf33e15ffec3a4b2/tewarolijalumeju.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b784ca0fb86---10049724508.pdfIn PDF document text
    • https://brazilairporttransfers.com/ckfinder/userfiles/files/37604255565.pdfIn PDF document text
    • https://censcakmu.org/board/file/files/nurasurifovozuzerurade.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/27274808681.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/lisibuxeromexofigafup.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac79901deb---fazorazusufosoxabur.pdfIn PDF document text
    • https://chungcungoaigiao.vnpec.xyz/uploads/files/16891136137.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=planning+in+chess+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_off0000d7ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AE 16508 bytes
SHA-256: 1a76ddf8a0f9506a00d35c297683a11920450372e1ee6bcd569068829d0908f0
font_01_sfnt_off00010232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10232 10580 bytes
SHA-256: 1f2ce071496db2ead16bf9204a48a1f2ae5c19840b3290ce424c2f24ff22df8d
font_02_sfnt_off00011a01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A01 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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