Malicious PDF — malware analysis report

Static analysis result for SHA-256 47aa94e2fc1f9dba…

MALICIOUS

PDF

81.8 KB Created: 2021-09-04 08:47:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 76bd74596cfc2ca60cf5d3b9bd6a4b65 SHA-1: 13acc44082c88dedebe5e9b9b6f0b882d1c76415 SHA-256: 47aa94e2fc1f9dbaca806320efbb14dba9bf502324a11ab0929053474d231140
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, characteristic of a link farm used to distribute malware or conduct phishing. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://fields-on-earth.com/images/blog//file/68219500588.pdf In PDF document text
    • http://cayxaotamphan.net/userfiles/image/file/birevifugolepafafa.pdfIn PDF document text
    • https://marwaautorepair.com/nbloom/fckuploads/file/nikakurizoxiresona.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610e1dbd82bf5---96404246129.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/f280ef1790dea423a6a2f900d9e55dbe/kedaxumazip.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/ruwozozibizuxumudovuxax.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/8606686925.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa7969bce4---nulovisezegibajija.pdfIn PDF document text
    • http://jp-cable.com/d/files/86221727735.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/sg1nqakg13mkvne68nckof1ebq/pararamuwemetajifadulise.pdfIn PDF document text
    • http://kuzfarm.ru/images/file/zoxuzafuvozukakuzorugub.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/8d01d974d45fffb69ae03f472cffb151/31722823115.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/guluxiletazisibap.pdfIn PDF document text
    • http://snuhonors.com/userfiles/file/varuxorijojinejafov.pdfIn PDF document text
    • http://tingchucontrol.com/Uploadfiles/files/99390549051.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/06158168c06459182b4b446d6374a8b0/javokib.pdfIn PDF document text
    • http://culbertsonlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/26031502660.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/631vpob7fuuvagqthi22v3914f/65455173591.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/16088d794bbda4---49398351250.pdfIn PDF document text
    • http://feg.vn/uploads/files/noxopav.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/16096d4aebf707---vogigebuvuron.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/17018465377.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=months+of+the+year+worksheet+for+kinderPDF 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_off0000d971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD971 10688 bytes
SHA-256: d690bdb007f74441482359560a4cfd112a368b89f140147e9ff3f4dd9ddf09e3
font_01_sfnt_off0000f208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF208 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A1A 18172 bytes
SHA-256: 64f23e2ff5cf80217f10704a9ef07ab0b4bfe7e3ff311d11a1e263deb5f4aa55

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