Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee04c0930c0c3b90…

MALICIOUS

PDF

68.9 KB Created: 2021-09-29 10:44:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 99d51b0b60869ead512199477e44c458 SHA-1: de60cebe3080e86ce3e74fc1df103f7e3c74f385 SHA-256: ee04c0930c0c3b9004223a88aeba2feae3bd8daa2b734c0580bd8cbe66517ba0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristic analysis revealed it functions as a link farm, directing users to multiple compromised WordPress sites. One URL, https://garglob.ru/uplcv?utm_term=solitaire+farm+village+mod+apk, suggests a lure related to game mods, potentially to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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 https://garglob.ru/uplcv?utm_term=solitaire+farm+village+mod+apk PDF link annotation
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16145acedd2eb5---22892390031.pdfIn PDF document text
    • http://mayphatdienngocquang.com/media/ftp/file/3023374997.pdfIn PDF document text
    • http://huspanda.com/data/ckfinder/files/fuvenosowopovini.pdfIn PDF document text
    • https://ghadir-eng.com/userfiles/files/pawali.pdfIn PDF document text
    • http://giprozdraw.ru/ckfinder/userfiles/files/59961436837.pdfIn PDF document text
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/fokatenavisudogu.pdfIn PDF document text
    • http://xszhuhai.com/uploadfiles/files/melizinasusener.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613584300836a---22406309701.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/lojupuredoralofup.pdfIn PDF document text
    • http://divodizain.ru/ckfinder/userfiles/files/59364835399.pdfIn PDF document text
    • http://dalieuht.com/app/webroot/uploads/files/sizowe.pdfIn PDF document text
    • https://regenerateacademy.com/file/54849259808.pdfIn PDF document text
    • http://exteractif.fr/pictures/2/67592126285.pdfIn PDF document text
    • http://torremaggiore.sitmap.it/files/files/vipatutajuretazala.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/32690581383.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/3b5303b4d096f75bea93a302702d3124/43330432337.pdfIn PDF document text
    • http://h-n-s.net/userfiles/file/15343335425.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/7d28ddd7d9816e714f0efc8607c7b29b/kukomep.pdfIn PDF document text
    • http://bimbrlata.cz/UserFiles/File/wunezi.pdfIn PDF document text
    • http://acril.ru/ufiles/files/67961039035.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/jelavisaniwu.pdfIn PDF document text
    • https://navliecky.net/userfiles/file/jaridedov.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1614e5126627fb---54445584745.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b212cc4135---muruxep.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_off0000aeb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEB0 14772 bytes
SHA-256: 38f528d9a54c5db13da8548b05fb4a4e68cbd4ede972c9b98700127025b4d51c
font_01_sfnt_off0000d3a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A3 10800 bytes
SHA-256: f293d255b2ec51c2531835f942ed02cde8dd75d68f1d7b606a96d459e9befd83
font_02_sfnt_off0000ec62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC62 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1