Malicious PDF — malware analysis report

Static analysis result for SHA-256 942b4df45941333a…

MALICIOUS

PDF

85.9 KB Created: 2021-09-04 18:05:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d6a2a2ae9585ab84ae7d17a3bbcd3c19 SHA-1: d57bdc1d8126f8d92e6e1bb9a64b94ace156aa0e SHA-256: 942b4df45941333aec02758f56c10e903866f016871a589ad5ef079a0f7b208c
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://urgentcarepb.net/userfiles/file/39788259577.pdf In PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee9d3b9163---56525990707.pdfIn PDF document text
    • https://lusagroup.mobi/images/website/user/files/xazumoro.pdfIn PDF document text
    • http://gildiamasterov.ru/userfiles/file/lutizagewenerutelebibovi.pdfIn PDF document text
    • http://normel.org/files/upload/file/62644194380.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/bfc5d6cd5abe955b0d5bf8caec8c7cef/kafaxaminiselomu.pdfIn PDF document text
    • http://sibzakon.ru/ckfinder/userfiles/files/31162282973.pdfIn PDF document text
    • http://dgjinhak.kr/DATA/upload/files/202107161001397637.pdfIn PDF document text
    • http://dentalcenterstudio.it/userfiles/files/87182020076.pdfIn PDF document text
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/85395849727.pdfIn PDF document text
    • http://synthecinter.com/userfiles/files/biroxunaveran.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e67c579e412---bejafesufa.pdfIn PDF document text
    • http://glovimex.com/uploads/ckfinder/files/wivowuxixofinixepimebaj.pdfIn PDF document text
    • http://regimhotelierbucuresti.com/images/userfiles/lamejewojexikosolevi.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a587eba9597---87247234993.pdfIn PDF document text
    • http://architettoseneca.com/userfiles/files/jijeva.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/59691700322.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160893aead6cfc---kifewamuxokol.pdfIn PDF document text
    • https://wildnaturetravel.com/File/tiwidobewupafisavo.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/79b51f5ac1cc519b0c51f9d2c48f9fda/ruwejefubamupa.pdfIn PDF document text
    • http://belgium-ex.com/images/blog//file/96727599152.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/537d412ccdead6cbe49b36fd754ba10a/fexawegimujiwojis.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/gnshon15c0lcoa4gl80q0jtnq4/88029626902.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=treatment+of+electrolyte+imbalance+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001048b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048B 17420 bytes
SHA-256: 756fbb30e8e25309644a4e90f9dd30abe72062d78ab18b459c0a4f7c394b32cf
font_02_sfnt_off00013152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13152 10832 bytes
SHA-256: 9fbcc8eb18beccefe201a18e846ce885dceba7c8dccf2ee4db8b0e5ac76634f3

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