Malicious PDF — malware analysis report

Static analysis result for SHA-256 a43644e2cc736d10…

MALICIOUS

PDF

97.1 KB Created: 2021-08-06 07:26:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 40c0b0d11de1fe8ed4e80ecc9e2a4628 SHA-1: ef8e5647fc929f24fab13c0481c8f9025f63d2c4 SHA-256: a43644e2cc736d109172aa14de602d98e78c1bda289dc1f06cd56661187f233a
204 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a link farm pointing to compromised WordPress sites, suggesting it's designed to lure users to malicious content or download further payloads. The 'SE_CLICKFIX' heuristic indicates the document likely contains social engineering prompts to bypass macro restrictions, instructing the user to execute commands directly.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://suachuathietbi.com/upload/files/vorefojexokadisopaparerad.pdf In PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/5fa40f82a672c1a1d330de15bab0a8f7/5267606257.pdfIn PDF document text
    • https://transpack-krumbach.de/_upload_bilder/_filemanager/file/63409116478.pdfIn PDF document text
    • https://art-eria.pl/mandarynka/pliki/files/wojubijowubexi.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/22957493395.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/21e2acffe9e532b579c12072c71ac4d4/45069398178.pdfIn PDF document text
    • http://mooneyes.pl/userfiles/file/14612951490.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad11c94bae---pupakipebejeseniki.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbfe789f86---58150129448.pdfIn PDF document text
    • https://machinex-machines.com/UserFiles/File/38529113548.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073edea7743b---82285774926.pdfIn PDF document text
    • http://statsale.com/data/upload/ck/files/xunodezizexajolutomidufuk.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/0b25dc2eae32c7afcded42675cb0960e/rilopa.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/lixuvadofaxogotigewija.pdfIn PDF document text
    • https://medicabg.com/uploads/wysiwyg/files/teranopusomuxudi.pdfIn PDF document text
    • https://newchat.xyz/js/ckfinder/userfiles/files/molizefakorugik.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607988dc282a5---rokowaxogutubof.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/96571841841.pdfIn PDF document text
    • http://mutitar.com/user_img/files/dobesor.pdfIn PDF document text
    • https://wkd-uk.com/wp-content/plugins/super-forms/uploads/php/files/21a7d106d6effe81a561c7bb1d9bcf77/pelarogijuzazodesomek.pdfIn PDF document text
    • http://ninda.vn/userfiles/files/juwabidolozifa.pdfIn PDF document text
    • https://mclandpin.com/calisma2/files/uploads/gudekukaroxexixirero.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+get+clownfish+voice+changer+on+xboxPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6D 17588 bytes
SHA-256: 0e68974eda543a43074d091ab94585f50e9e3f6a3244a2db902f672ee5790c00
font_01_sfnt_off00013bb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BB5 11000 bytes
SHA-256: e50637e61fa5bb4a79566959d969189e8c776dda13fa24ef383b5a39001db89d
font_02_sfnt_off00015548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15548 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00016d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D55 1776 bytes
SHA-256: 1092c062515a0e7c9fcf1de286437c915e481785be0ae9a2f6895ca910c008c6

Open this report in the interactive analyzer, or submit your own file for analysis.