Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0197f8dfbdeb5a2…

MALICIOUS

PDF

78.9 KB Created: 2021-09-07 02:15:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 057eb1423a8dd32880d7c245b51c8cae SHA-1: a82a52dbbad09bda1cb925567a5993b0e5cd95ac SHA-256: c0197f8dfbdeb5a2f26f4aee09972cbf585241fa3ac21d976aca38421ea4a8bf
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites, suggesting it functions as a lure to direct users to potentially harmful content. The presence of multiple links on disposable hosting and compromised CMS uploads reinforces this phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/12gbh6t6gndlsm1ctnjl72o1gc/pozejerapitax.pdf In PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16095b820bd7a8---pidila.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f0488eefa---silukudekifuwitipudanexag.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/9a936c1379a0d51b884998907bb2cbba/jabujuwererupomilifigi.pdfIn PDF document text
    • http://sushimura1.com/uploads/files/39295472076.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/81254449879.pdfIn PDF document text
    • http://jongauger.com/userfiles/file/zogakam.pdfIn PDF document text
    • http://fatfailogistics.com/fckeditor/files/file/kemuzepikewobigaxat.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe5477cb6c---paviwavirodeselut.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ddf8c34d407---sulogozunaxoromuwexor.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f0c0c4980---tigusoxorasujix.pdfIn PDF document text
    • https://tcremich.lu/files/files/58040618308.pdfIn PDF document text
    • https://crossfitbeeshark.ro/app/webroot/files/userfiles/files/36409609247.pdfIn PDF document text
    • http://maynenkhipuma.vn/quangbasanpham/app/webroot/upload/image/files/pepegirujuxorebukivosolof.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160a680dea93eb---jupimuw.pdfIn PDF document text
    • http://uralcomservis.ru/crn_fls/crn_files/ketuzinew.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16117c24f838d7---juworeminadejubago.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/c5e20703aaba39600e163bf208735fc5/notafejemeleretalovisu.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/a50d9bd06166739035c459a34a6334f6/gemiwagilovikaruwegejew.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d3873ee71---19966018340.pdfIn PDF document text
    • http://jornalespacoaberto.com/app/webroot/datafiles/editor/files/40914496897.pdfIn PDF document text
    • http://needychild.org/ckfinder/userfiles/files/xodugiloxaletejukixabi.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/47431228953.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=constitution+of+pakistan+1956+in+urdu+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_off0000cf53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE765 17568 bytes
SHA-256: ee77d9515637a2ab8f9a7895f8078b27fdfe3310455c7e76e7e7d2c19f79a494
font_02_sfnt_off0001142b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1142B 11056 bytes
SHA-256: 5de051be51a8b0c0b241b7d05a4a2a1b974f634789ef635eb50577485865ad55

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