Malicious PDF — malware analysis report

Static analysis result for SHA-256 06790a1a2067d09c…

MALICIOUS

PDF

79.3 KB Created: 2021-09-09 01:21:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b8a95f5dce20cae066e3f952288a4098 SHA-1: 656d44a3fb138dce1dc72f2473a5b04969f8ec1d SHA-256: 06790a1a2067d09c686bdda40c52aa7b8cac410d8510f24f8cb22314a6230475
156 Risk Score

Malware Insights

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

The PDF contains a link farm hosted on multiple disposable domains, a common tactic for phishing or distributing unwanted software. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. The presence of numerous links to potentially compromised or disposable hosting reinforces the phishing and malware distribution pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://okgwa.net/50/files1/file/sibivexipega.pdf In PDF document text
    • http://nhatngungoisaoxanh.com/upload/files/49394059793.pdfIn PDF document text
    • http://stapper.de/sites/default/files/userfilesfile/fepiligisever.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/warogof.pdfIn PDF document text
    • https://solelane.com/ckfinder/userfiles/files/nefelaj.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/dg7uniibal5tel5q9vs4dv5p90/kifoxuzabukomotapitame.pdfIn PDF document text
    • http://vers-ma.de/userfiles/file/38891250675.pdfIn PDF document text
    • http://kolaykanal.com/userfiles/files/78082424545.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/fevomibutulakobit.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/714998689.pdfIn PDF document text
    • https://yaslibakicisi.net/userfiles/file/wibivofo.pdfIn PDF document text
    • https://quanticabtl.com/cms_2018_quantica/sgi_userfiles/userfiles/files/lavifeveriwezemukevug.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16132a64aaf804---tukewowumelaniluginuf.pdfIn PDF document text
    • https://speedwayinfo.hu/uploads/file/45110395262.pdfIn PDF document text
    • https://yunglin.com/uploadpic/files/gorexepig.pdfIn PDF document text
    • http://annabarons.com/files/files/17571542096.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///33433712058.pdfIn PDF document text
    • http://daiduongmetal.com/uploads/ckfinder/files/seniwuloxapis.pdfIn PDF document text
    • https://fobh.net/userfiles/files/nibiziluniwomomafezaw.pdfIn PDF document text
    • https://rinducm1.com/contents/files/wevukilidapabup.pdfIn PDF document text
    • https://technoarc.net/userfiles/file/23773634100.pdfIn PDF document text
    • https://ku4ysk-9lgp4y.com/contents/files/vesowukekekivemamotare.pdfIn PDF document text
    • https://espritgt.com/userfiles/file/76301401302.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161361dcdf1b20---80176202452.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=snaptube+app+download+installPDF link annotation
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/53640061629.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_off0000d33a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD33A 10688 bytes
SHA-256: 88a64bf56e571901213a8f1ffb43c14c52acc9de0790d67c861bf2397c93ea51
font_01_sfnt_off0000ebad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000103bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BF 17008 bytes
SHA-256: 8e2ba724fa92bb58be255579f13f790f38995084805d94c74e8ba77e0da05247

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