Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4aa49593b70d38d…

MALICIOUS

PDF

103.8 KB Created: 2021-07-05 13:42:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 0374bb8058c97a9a48b44d661db9b873 SHA-1: 62878356790ca896deecbf2ccc2113325a556697 SHA-256: f4aa49593b70d38d778025e34aaa65ce8580b7c1fa41d4cb35217e43787df296
196 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to redirect users. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates the document's purpose is to trick users into paying fees for non-existent prizes or parcels. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9687

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://synerhu.ru/uplcv?utm_term=the+big+short+full+movie+with+english+subtitles PDF link annotation
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774f75be9cc---jitarawijivome.pdfIn PDF document text
    • http://cungcapluonech.com/upload/files/zufuwubibobusidim.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/71268195748.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/34ms8bo2n3m26imh0clhjbmbo5/jenidikilerodo.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/16312251852.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/85892673491.pdfIn PDF document text
    • http://nuovartea.eu/userfiles/files/donizapukufozutajaso.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/33p3ts65r46l3i5ol9tf2u980n/41019876823.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079454276539---zewajadurevikirevapez.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/edd1c3f6a12e1692d6ad0e60c9724939/lexejejewukagob.pdfIn PDF document text
    • http://midel.me/userfiles/file/kezotolijekaxikako.pdfIn PDF document text
    • http://jghsclass75.com/clients/f/f3/f322050927ea28328664fd088939ffaa/File/sozajokivenamimeditixakeb.pdfIn PDF document text
    • http://vejwun.cz/images/pomitudesav.pdfIn PDF document text
    • https://vietfun.com.vn/wp-content/plugins/super-forms/uploads/php/files/hjse0fbj72pguronfh9cmtpavs/25171560152.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/pugogi.pdfIn PDF document text
    • http://gibson100.com/clients/870224/File/38676664575.pdfIn PDF document text
    • http://cityhigh78.com/clients/2/2d/2ddbae4fb74c169819b3574d76e4e264/File/jatubuganumugofiluzado.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cbfc7e1dfd---poroseze.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ac90c6d9c47---gasalimal.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/93504159239.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b89787a0067---29458373851.pdfIn PDF document text
    • https://jaiminsales.com/ckfinder/userfiles/files/bemifivu.pdfIn PDF document text
    • http://barbusci.it/maisUserFile/file/zuwotet.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/d35smk7k1qn6fgbfm5rp6fp1sg/17840063985.pdfIn PDF document text
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11081 18508 bytes
SHA-256: fb8a9fb076ba74aa7ae3fff43ab2ebda291f21e939f12a28c92f9640aa253887
font_01_sfnt_off00014126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14126 10852 bytes
SHA-256: 77bf2821c925626f94a9569c340287f9db49d8cc6e3ab09c039e2be378779b39
font_02_sfnt_off00015a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A13 16280 bytes
SHA-256: d7cd55395ca8c5b3ded2e9f44cdcfdf374181edfe397b2f4d7fa01d4c9eac515
font_03_sfnt_off0001702b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1702B 1784 bytes
SHA-256: e56bba586f25b7bb331306cce9154593ee2e022724dfd3cbe2c17502343e7eeb
font_04_sfnt_off00017890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17890 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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