Malicious PDF — malware analysis report

Static analysis result for SHA-256 832145329dc9fc96…

MALICIOUS

PDF

95.4 KB Created: 2021-06-28 21:14:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6b7bcd6b7a3e75789aa7d86fa5a91fc5 SHA-1: 86c14d3bb404d60c8a4f80d26903bbcdcc20f79f SHA-256: 832145329dc9fc9665a8c2826a7c0a6f41de3dc6ff40785aba66f0ab115b904e
156 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 a machine learning classifier. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. The presence of external URIs and a link farm indicates a likely spearphishing attachment delivery vector, leading to exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9904

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://synerhu.ru/uplcv?utm_term=shat+meaning+in+tamil PDF link annotation
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607904041e828---zoweligemonugosumor.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/47195682354.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/tumaniludiwiw.pdfIn PDF document text
    • http://rallyteamwalraven.nl/file/tatenovulupedugodikak.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/27f8pq7uci8orud81n0verlpoq/9430052659.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/a68dee77f3354236d252d7f4498de0b0/21137277388.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/93753560428.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf03cdfbdf---duvefid.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083d768a55b8---34833820708.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/4da90955d7949f33e47e324e2dea4583/sulubosubirupo.pdfIn PDF document text
    • http://nguyenquangcomputer.com/upload/ck/files/89856355153.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160963b23f2494---rozerenusidemuxug.pdfIn PDF document text
    • https://doublehair.center/upload/ckfinder/files/vifebawepowozoz.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/7b276b55ae717bd9037b320037331a93/kunetigigatazu.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160832b07678d2---buwegalafuxezigisiwegi.pdfIn PDF document text
    • http://hondatayho.top/img-ngocbao/files/15069306433.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/rugerukawefarenujojeti.pdfIn PDF document text
    • https://cdmsig1.com/ckfinder/userfiles/files/dukekilubexiximovafabu.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d290d62096---17406850902.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/0244094926aa7dbfb684642496d14c94/penimenarajevaxelovavov.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/afd6d5911fecdd85ea5168bb2222743e/fifidakobitivumesulifut.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/5pm02a1tv29all5fsnaecvsc56/jiwoz.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000dd68.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xDD68 18644 bytes
SHA-256: 0665ddd9a39deaf3649ab1be4052bcdeb688bf880b28ff6119ea0248feb0943d
font_01_sfnt_off0000fc23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11435 22248 bytes
SHA-256: 909de57cfc4c729b094a837dee71b12ab2eff9a9e2e9487684c5d1041bcf08d8
font_03_sfnt_off00014b46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B46 3464 bytes
SHA-256: a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff
font_04_sfnt_off000158c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158C6 10244 bytes
SHA-256: 9cc59fc9e0c153505c325c1c5d79466a99d6dc05a9115d01fa01a8550d5f1e56

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