Malicious PDF — malware analysis report

Static analysis result for SHA-256 024a810552fd5754…

MALICIOUS

PDF

71.5 KB Created: 2021-09-03 21:57:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e045a96c0dc08ca06ad934056075ab2a SHA-1: 606ae87a121a3807773edb9a6adf7f57575e631a SHA-256: 024a810552fd5754b1a06a5d9251a87a1367a7a7439710fccb4c743fb97b91c1
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 WordPress upload storage and disposable hosting, suggesting it functions as a link farm to redirect users to malicious sites. The PDF structure and embedded links point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/d202cd8759f5c72e1bd74f2f61685178/pagudefemowafodivosasafow.pdf In PDF document text
    • https://hohsingfiber.com/ufiles/files/95069483805.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/ef6bd3fe6d827a4eb2364c6ee1efeb10/80744238364.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/7655fdaefaafd4dfef36c3462e042dd5/71186589075.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/5ecn89aon0c3s6gs1i1ucjn19j/magubexevupop.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/tuzesuvula.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210826_42FD7E0C7369F029.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/65983724096.pdfIn PDF document text
    • http://abbwingslynnhaven.com/uploads/files/kenuwapedoruza.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/57777111663.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f54097fce---jutasowugive.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850cbfb6746---ruvebatitavabi.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/xapasorefepafa.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/550730e6523fed5e6e747089d9d3503d/79793311667.pdfIn PDF document text
    • http://globalquestconsulting.com/userfiles/files/pegaxaxevusajunelozodu.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160bd35ceccb7f---tesupuniguripasekivotit.pdfIn PDF document text
    • http://statsale.com/data/upload/ck/files/wokudatubaxekavaso.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/f5c7e45388865b54973bde1b01074b31/bitabapifejarepup.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987465d7937---bipeniduropopoge.pdfIn PDF document text
    • http://laxycoffee.com/upload/files/bibubaj.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948e3e6b8d7---77987447072.pdfIn PDF document text
    • http://digemnd.com/UserFiles/file/ralipopewezatanabenox.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f1b12ae2b---xirimubediwarifofesuvidi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=eckardt+positioner+srd960+manualPDF 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_off0000b47c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB47C 11308 bytes
SHA-256: 0a69b7b869987df696c942d34c21cf69e363a740ef19d0a04f4b3d8e04acfafb
font_01_sfnt_off0000cef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF5 16268 bytes
SHA-256: 998876b8412b883cb085016da39e2d5114375d634c53ee028b10db958989d68e
font_02_sfnt_off0000f8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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