Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9ad730ee24d07be…

MALICIOUS

PDF

86.2 KB Created: 2021-07-27 21:13:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1d12dd82cdb130e4d6f3d466745406db SHA-1: 3f39083c71144ed61f2e1dcda91dcadb408b7921 SHA-256: d9ad730ee24d07be58a8a219d71c1ee00bcb5dfe356636824c849e1072b2ef40
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identify it as a link farm pointing to compromised CMS upload directories, suggesting it's used to distribute further malicious content or phish users. The embedded URLs are likely part of this distribution or phishing scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/6cadfb4f7ed5b6ce77c9cc7a9dd857e0/31998209685.pdf In PDF document text
    • http://beiks.info/public/file/89909664429.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/4b3030f589fe52e951e6c01fbb0a9160/91747627735.pdfIn PDF document text
    • http://dangkykinhdoanhkiengiang.com/upload/ck/files/xukonexoxosuda.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608258aed5798---15029695231.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608923a95df2c---74968709910.pdfIn PDF document text
    • http://asianmosaicnyc.com/userfiles/file/31829913134.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/i4415khlrjhphe3rish97e6d43/surubuvugubosajagoku.pdfIn PDF document text
    • http://filatelianumismaticaumbra.it/userfiles/file/buwaxotixepejiziruxar.pdfIn PDF document text
    • http://sanga.asia/userData/board/file/79018192985.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/9d236cc3438228020a7c025afc96914a/soputujuxevifazaze.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe3df90c3a2---renixaruwabafosemufamov.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/9405b32a0c7381ee0620aa871a05079f/bujikitedix.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/lg3b3fbkute6iepcgujufqb484/45531851563.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/jivujafadowi.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609afdbe2418a---botibok.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1951b56d8---fipawupez.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/90979791733.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e29d19d72---78329904203.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/rarolukidofebuvaravi.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/e0957d02963dff7e70bdf891c7470cc4/nepatemijolos.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/2d79c67a3b124eece630478762aa1ffb/vevelumowatitinoru.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/papazus.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc5c883a87---botakokaza.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/senux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=what+are+the+methods+of+legal+researchPDF 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_off0000efd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD4 10720 bytes
SHA-256: 7fd17a74db16b374036479ea6b8ec17ad24acf79ee4389291ad091844c30e10d
font_01_sfnt_off00010856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10856 16248 bytes
SHA-256: 606c2d3078b44113dfcd6958fe9a7aebdc5582a4e3f222a8f40f1166a3a0d50b
font_02_sfnt_off00013236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13236 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1