Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d9012f62028e38…

MALICIOUS

PDF

69.9 KB Created: 2021-09-26 09:27:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 6fcc4685c24c20c40a97e620d0d3548b SHA-1: 7f3b611802f0c0ba09e125b147dd2306ad1b2d6e SHA-256: e0d9012f62028e3822c22bedda316bb2125332d29b8b03889f49e305530f54fe
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting an attempt to lure users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a strategy of using numerous links on potentially untrusted domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://queure.ru/uplcv?utm_term=queen+of+hearts+full+movie+free+online+watch PDF link annotation
    • https://carmelocuritiba.com.br/ckfinder/userfiles/files/13360049651.pdfIn PDF document text
    • http://p-itos.net/admin/userfile/image/file/zinawuzubi.pdfIn PDF document text
    • http://tecresconsolidamentorestauro.it/fck_data/file/ruganojenifisejisilewo.pdfIn PDF document text
    • http://jinsonmetal.com/Upload/file/99325952031.pdfIn PDF document text
    • http://extrastyle.ee/ckfinder/userfiles/files/mituliragudixuzat.pdfIn PDF document text
    • http://cabanagarden.hu/editor_up/lasonuguzubipol.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/b953e0d2b5879b77adbc146f40baacf6/futosarejuxiranifujim.pdfIn PDF document text
    • http://medicalproduct.hu/images/files/zogafanejojode.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-9-3/20210903123612385120.pdfIn PDF document text
    • http://parcroyale.hk/userfiles/82825259979.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/161408d7a1e718---72772285843.pdfIn PDF document text
    • https://aukshanya.promosing.com/alpha/ckfinder/userfiles/files/xixewezexobarejekukakut.pdfIn PDF document text
    • http://tunecharts.com/userfiles/file/84125074939.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///41338192615.pdfIn PDF document text
    • https://leanuslab.com/UserFiles/file/segupoboxopesegamuruxeb.pdfIn PDF document text
    • https://loppisidjupdalen.se/images/uploaded/file/52865202018.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/kbhfqkg8g0naedc7in3gbf301p/japetofedada.pdfIn PDF document text
    • http://paramountswimwear.com/userfiles/files/44815264105.pdfIn PDF document text
    • https://ises.ca/phpsites/vertical_living/uploads/file/78478530102.pdfIn PDF document text
    • https://inprovitpuertorico.com/ckfinder/userfiles/files/gavibonaropesumorogurozuz.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/tibabisegezujoxixedijomir.pdfIn PDF document text
    • https://makiriaszto.hu/ckfinder/userfiles/files/gigefojugarujupurabujili.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_off0000aec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6DE 10912 bytes
SHA-256: b4e1763b2f8431154034ae3678b46afbfa150e9aa7afb8690473ead203226a8b
font_02_sfnt_off0000e01d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01D 16444 bytes
SHA-256: c592c8f26522f9f12d0b5ce96231bd70b11aae507178dee227119cb311853035