Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4775ae6ba0a4396…

MALICIOUS

PDF

77.9 KB Created: 2021-09-11 23:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 292e48fc841c47a7fe027025a7f46667 SHA-1: 8519179dcb299f45371b3bdeee1e7262cb09aa79 SHA-256: e4775ae6ba0a439687b61a112ddc104365a952358199be7fdc8b0d96f8056d19
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The 'SE_CLICKFIX' heuristic suggests the document attempts to trick users into executing commands, likely to download and run a secondary payload. Numerous URLs are present, many hosted on compromised or disposable domains, which are likely used for distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://synerhu.ru/uplcv?utm_term=minecraft+villager+guard PDF link annotation
    • https://remont-bez-zabot.ru/files/file/66991894258.pdfIn PDF document text
    • https://ms01bet.com/contents/files/putikita.pdfIn PDF document text
    • https://commonlawhouse.in/userfiles/file/ladanuzozusarojirugosozi.pdfIn PDF document text
    • https://www.comperat-89.fr/ckfinder/userfiles/files/wufenedowitinev.pdfIn PDF document text
    • http://bapassamarinda.id/assets/ckfinder/core/connector/php/uploads/files/92560378525.pdfIn PDF document text
    • https://www.larche-de-jules.fr/ckfinder/userfiles/files/posepiwugow.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/ca45c6fc5ca63e236cffcaf3e113aed2/jujoji.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/91012081842.pdfIn PDF document text
    • https://cabsfromheathrow.com/userfiles/file/kekotiveguvek.pdfIn PDF document text
    • https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/64913510350.pdfIn PDF document text
    • https://pgp-puh.hr/fck_media/file/niripusokuk.pdfIn PDF document text
    • https://amadesafar.ir/basefile/amadesafarir/files/3637416003.pdfIn PDF document text
    • https://raovat72.vn/uploads/news_file/8598124190.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/fbbb48cd2825227dd591fe365b7c034a/nutawewerelajadufiwopemi.pdfIn PDF document text
    • http://foto-preiss.at/upload_files/files/43251991115.pdfIn PDF document text
    • http://www.atccs3.it/atccs3/fckeditor/editor/ckfinder/userfiles/files/kaguwinufimuvutikaf.pdfIn PDF document text
    • http://abnigakgdsg.friendship-match.com/upload/files/13882052748.pdfIn PDF document text
    • http://thesciencenetwork.org/uploads/files/71395487285.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/72940662721.pdfIn PDF document text
    • https://qfuse.it/images/uploaded_files/ckfinder/files/1631067303_4d977d22db.pdfIn PDF document text
    • https://cakenflowersonline.com/userfiles/file/28341460379.pdfIn PDF document text
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/78453354889.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16130eb64e5ccf---66137069391.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e59b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59B 10524 bytes
SHA-256: 51b0b2d988b379a74449a676e0b037397f1b7373c7007198502c6231d729b79d
font_02_sfnt_off0000fd7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7C 17328 bytes
SHA-256: 77898f18c6f00280d7ec84fb4fc1f11b44526aa39e1f1e84065fe20944d5a651

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