Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c19d226283d7e39…

MALICIOUS

PDF

83.6 KB Created: 2021-09-02 07:50:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 719cdad1c90d4d1271212adbbf2153d6 SHA-1: df1fd08199fd0f38c462c1ed51d264d993080331 SHA-256: 2c19d226283d7e39acbd6d5d392435dbcfe86e447594e3c80c880fbf14f4b975
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://a9188.com/upload_files/art_files/files/20210621_070932.pdf In PDF document text
    • https://zzarosiscarampola.it/file/70507026310.pdfIn PDF document text
    • http://cwesp.biz/upload/file/zubumul.pdfIn PDF document text
    • http://wintec-samu.hu/uploads/files/xivelo.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/4c02c2800dfe4fb9e901cc447a5fa111/35737482094.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/21573271002.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607496d2618ef---72495681541.pdfIn PDF document text
    • http://raiders71.com/clients/4/41/4134020f2f298c111575624a380fabfc/File/wejejotumud.pdfIn PDF document text
    • http://bora.su/ckfinder/userfiles/files/josujuvakokaseworazige.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f41787dad0---tojukuvuzatodezov.pdfIn PDF document text
    • https://btegypt.com/file/66989583624.pdfIn PDF document text
    • http://michalpavlicek.com/uploaded/file/samiwosufediroreme.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160adaa41001c5---koridajudolujixebazabenu.pdfIn PDF document text
    • https://alutat.com/data/file/remigugotepabodud.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089650cda488---dimagedadogupowu.pdfIn PDF document text
    • https://coastalstudio.com/images/main/file/52466149262.pdfIn PDF document text
    • https://basealimentare.it/webroot/files/fck_uploads/File/96410875992.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/df1e799950b1c709d4fa5d95503bedee/20907003823.pdfIn PDF document text
    • http://kipia-nn.ru/userfiles/file/43973170724.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/widiloxipifodofuxokukuki.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/9243ec110be91650a31ec75cd1cada01/42661231567.pdfIn PDF document text
    • http://cdmvt.cz/sites/default/files/39145588391.pdfIn PDF document text
    • https://krantiservice.com/ckfinder/userfiles/files/gutunupiwarokenaxi.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/943917adb3abb57f0e4fd7b27edc4de5/20299117612.pdfIn PDF document text
    • https://nestaerospace.com/uploads/file/fufotukazipeporigufugigos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=fltr+thermometer+change+to+fahrenheitPDF 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_off0000dfec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEC 10592 bytes
SHA-256: 1b3c269ffca69cdf3add83139ce87ed4a94bd88a1239fee096379c1e0e734a04
font_01_sfnt_off0000f7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E1 18704 bytes
SHA-256: 15a86744dee274cfa6573743063ac8320ced4b3fa51cddf4e95deb4ad1860c2e
font_02_sfnt_off00012717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12717 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1