Malicious PDF — malware analysis report

Static analysis result for SHA-256 6984cdbd323feb77…

MALICIOUS

PDF

73.4 KB Created: 2021-09-20 03:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0953e65e5116ad792dcd30cf3827717e SHA-1: 82365c6c870ffd9b47ba568e5c2a8cc1e55a47a9 SHA-256: 6984cdbd323feb7772c6cf1047cc3e2bbd5e6695794fbd09fc1f6c295a95877a
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS uploads, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The file's structure and URL patterns are consistent with a spearphishing attachment used to lure victims to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://laborke.ru/uplcv?utm_term=ispoofer+for+pogo+ios PDF link annotation
    • https://bem-sa.com/img/file/pedilaronekizuf.pdfIn PDF document text
    • http://iuoooo.com/filespath/files/20210904170949.pdfIn PDF document text
    • http://restokrat.info/userfiles/file/54029652121.pdfIn PDF document text
    • https://anyimaker.com/upload/users/files/88523849131.pdfIn PDF document text
    • http://waypl.pl/upload/File/82618888243.pdfIn PDF document text
    • https://livresdarts.com/ckfinder/userfiles/files/fenunenosibopesamasuxatox.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/84464856995.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e314f53074---senogobivupoxitologu.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/xudipelepuvizezo.pdfIn PDF document text
    • http://ohxto.com/uploaded_files/userfiles/files/2959958643.pdfIn PDF document text
    • http://www.angels-rest.es/ckfinder/userfiles/files/80590324124.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/4846855940.pdfIn PDF document text
    • http://filippodelvita.com/demo/userfiles/file/45808042299.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/8df0cbd154aaf98efe8410a5e2b687e8/10099113225.pdfIn PDF document text
    • http://wpscrm.in/uploaded_files/userfiles/files/xogeferovuf.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/35148069362.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/161381dbe1d2ab---97877924167.pdfIn PDF document text
    • http://gpe-el.pro/ckfinder/userfiles/files/penogesadugek.pdfIn PDF document text
    • https://kawanmto.org/contents/files/pizemivano.pdfIn PDF document text
    • http://skpizzasubs.com/uploads/files/dukarelojesezofizenu.pdfIn PDF document text
    • http://morebricks.com/ckfinder/userfiles/files/jigojokibavebidirimivere.pdfIn PDF document text
    • https://full-flavors.com/img/Data/file/vapibanuvinimemab.pdfIn PDF document text
    • https://mimpi1pusat.com/contents/files/76300669093.pdfIn PDF document text
    • http://tandprotheses.com/ckfinder/userfiles/files/janala.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB91 10072 bytes
SHA-256: b3f7d3e3feaba8355e845c9eccad77f7a0e811ed14b30688708e5d6e7a1f2b66
font_01_sfnt_off0000d210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD210 17920 bytes
SHA-256: 227aebbd1a48960401d9b5fadddffabc19487755ede553e8620b9e78629ac054
font_02_sfnt_off0001001c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1