Malicious PDF — malware analysis report

Static analysis result for SHA-256 1df9b481935c4560…

MALICIOUS

PDF

77.1 KB Created: 2021-09-20 09:56:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 110b9fa2bfeab8323bd56c85fdc024ae SHA-1: 4afc4482de0d01811b990eae8dc3b87d3944dcab SHA-256: 1df9b481935c4560bcaf9ca867fa7d6eb07e1f71c6c32e61730505872ee579f5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple disposable or potentially compromised domains, suggesting an attempt to obscure the final destination or leverage vulnerable sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://samsungklima.net/upload/ckfinder/files/xuvazoxisip.pdf In PDF document text
    • http://21cedu.com/pds/userfiles/files/87496579384.pdfIn PDF document text
    • http://sushibelovo.ru/files/vonubej.pdfIn PDF document text
    • http://francescofesta.it/userfiles/files/86221830729.pdfIn PDF document text
    • http://vibestedu.com/_UploadFile/Images/file/88923115179.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140fde4af520---23294704991.pdfIn PDF document text
    • http://audidalys.lt/ckfinder/userfiles/files/gepub.pdfIn PDF document text
    • https://cissud.it/uploads/ck_editor/files/jutosevotemakewakori.pdfIn PDF document text
    • http://scarpatti.com/files/98564044694.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/4c26dbf7d0b92731d7497c01401cc044/xalamowa.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/48110366839.pdfIn PDF document text
    • http://xn--22cjbbm2eyae3ehabdb4kqdtae3dxnnc1fhf.com/user_img/files/97222614731.pdfIn PDF document text
    • https://alienaquatics.com/home/gb/public_html/ckfinder/userfiles/files/95504349222.pdfIn PDF document text
    • http://daieimotors.com/js/upload/files/kizegudujafuw.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/09/16/file/20210916_075559_164.pdfIn PDF document text
    • http://mweb.cz/images/file/vemogu.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/97defa9f3d85680244e549f5833c0a6a/67424622266.pdfIn PDF document text
    • http://gibisch.org/files/files/52856001797.pdfIn PDF document text
    • http://tentimesneedlehill.com/UPFILE/userfiles/files/31253128851.pdfIn PDF document text
    • https://xn--90aoja6ahg5ds.xn--p1ai/uploads/files/nebelajewuz.pdfIn PDF document text
    • http://gryfarmerskie.pl/pliki_wyswig/files/28776488060.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/tigofiligiluzobedik.pdfIn PDF document text
    • http://thietbiotovn.com/Images_upload/files/37545871879.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161448330d0ab9---xesusetesaxatipimu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=night+time+clock+androidPDF 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_off0000ca6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA6E 16992 bytes
SHA-256: 72b9d7581284e214af6f41f870f1eb58da1bdbf988359d7b1447386fc2bbd72b
font_01_sfnt_off0000f673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF673 10716 bytes
SHA-256: 6c08daf94b0bcc03b04454c0efbe851991c3ff1fd966090e2f31630e07639357
font_02_sfnt_off00010e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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