Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8c683ca703b6525…

MALICIOUS

PDF

97.8 KB Created: 2021-08-02 08:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 24b8163eb3df45fd857923600e90f269 SHA-1: bea6dfde75bec1deda6eb394c3501d424d077bc5 SHA-256: b8c683ca703b6525f1e3998cb36cbbd9855a5a7e1cc20b70ed1ad085bbf3c028
196 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting, likely intended to lure users into downloading further malicious content or engaging in phishing. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates it may also be used to disguise malicious payloads by instructing users to open a password-protected archive.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://hotnews.md/upload/userfiles/files/11563495125.pdf In PDF document text
    • http://ahxxzx.com/userfiles/202106/file/luloxa.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/7svvcp7j6f8fvvghkq5150mk97/felubo.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be2647060c1---78003500886.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/21445487546.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/d7ed29e0e7353f054fe664b5ba0e4e70/53269301696.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4061b08ccf---davizemuf.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/nazuruzejumezumojemokiraz.pdfIn PDF document text
    • http://diamondsnspurs.com/clients/12200/File/wexakenula.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/558b1ef7485fdd581a50e3fa8303e87c/lofetixatudejasuzukul.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/7hjbtvj4el2m36jhud2sdf50n5/35406831446.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a106a31e57---64666484701.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/220a59aafd73bcd37ee5444474fac3e9/74823936874.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210801130709154.pdfIn PDF document text
    • http://mastervin.ru/files/file/kogejin.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210608_F57241E0D1F2F874.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aebd42986ae---kujiwuwaviju.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/49cc9031763d774f9f0c983700d3978f/jipodokaruxut.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/bakumowosekezebidijer.pdfIn PDF document text
    • http://residenzaeden-albisola.com/userfiles/files/xenudejuzubanerididibo.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d925535224c---19555716192.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16092af618b9ce---7115418280.pdfIn PDF document text
    • http://kimbuunguyen.com/uploads/userfiles/file/11485590509.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=alfa+network+awus036h+driver+windows+7+64+bitPDF 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_off00010d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D45 11504 bytes
SHA-256: 0947db4dbc3ff4e3c2c8e4fa91da3a9e2635f266f710e27322602d7ff3d3aff8
font_01_sfnt_off000128a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A4 21024 bytes
SHA-256: 8b696f414bfb85eca0d7c70d992a53eff2f6be872a9de804bf9107791e6bac1e
font_02_sfnt_off00015df8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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