Malicious PDF — malware analysis report

Static analysis result for SHA-256 133749ccc7ec0698…

MALICIOUS

PDF

97.8 KB Created: 2021-10-15 20:30:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 3eb91bf4138f74b252d44023ca5c6355 SHA-1: 1a62e12d1d332179e7e730147ff8e86e230cc3d4 SHA-256: 133749ccc7ec0698f8298188d06b090448a69e49af88bd3f7ac75e2595bfa48e
196 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of a phishing and trojan delivery. The 'SE_CLICKFIX' heuristic indicates the document likely contains social engineering to prompt the user to execute a command, potentially via a link to a malicious URL. The numerous embedded URLs suggest a link farm designed to redirect users to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9878

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://inwebjor.ru/uplcv?utm_term=command+prompt+admin+not+showing PDF link annotation
    • http://mrpokedb.com/uploads/files/famizabaxugenegupovidot.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161356cdbc700d---jelefanala.pdfIn PDF document text
    • http://quincy.pl/ckfinder/userfiles/files/57422297353.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/0884264ab4ed311838122889866a989e/23665700044.pdfIn PDF document text
    • http://meta-min.com/files/vugaju.pdfIn PDF document text
    • http://bctlorraine.org/userfiles/file/26535657683.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/mm16o7o2fn71gq4jh0sp4lcqfr/28976210118.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161408ecb49da1---puregevalo.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16169b867ccf87---84010552263.pdfIn PDF document text
    • http://millionsdiscount.com/mo_images/files/61296676524.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/2775374787.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16165381bd5200---xulawijixelagofunati.pdfIn PDF document text
    • https://civilkontroll.hu/uploads/file/58336219159.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/41024979511.pdfIn PDF document text
    • http://adveotec.com/img/file/piwekajiladimogexezivi.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/jotazusoruxufi.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1616971a4e921c---11340035889.pdfIn PDF document text
    • https://bikeid.net/ckfinder/userfiles/files/13766592840.pdfIn PDF document text
    • http://antasboru.com/guvennet/resimlerfiles/kavirilekeponepep.pdfIn PDF document text
    • https://cbdc.co/uploads/ckfinder/userfiles/files/42176453362.pdfIn PDF document text
    • https://soechi.net/userfiles/file/39330403049.pdfIn PDF document text
    • http://marsalanoleggio.it/userfiles/files/pozosusaf.pdfIn PDF document text
    • http://filipdegreef.be/uploads/files/dugagikufokurux.pdfIn PDF document text
    • http://amghanoi.com/images/ckeditor/files/58752526629.pdfIn PDF document text
    • https://ginniglobal.com/uploads/file/42608066581.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_off0000e43a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43A 10780 bytes
SHA-256: f4d5b2223b6f5b57af08dc6bda0a9c784c83cb7f3ae8e9c445e1d2a4fde37db5
font_01_sfnt_off0000fcb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000114c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C6 17256 bytes
SHA-256: 615442d82701028b2eda660090f1139466c44ab0239b523df429c9354d7dc159
font_03_sfnt_off00012eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ECA 27812 bytes
SHA-256: 504d4219c2b75a697bf388cb70a3394ec4c9e8ff9e2f044ed7ea0f17727c3a59
font_04_sfnt_off00016f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F79 1876 bytes
SHA-256: 665c6e1d05fdc5de2cf8409809fb58279edeb767b448e3cd1b281b182295eb51

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