Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a26217693f813c8…

MALICIOUS

PDF

80.1 KB Created: 2021-09-14 00:16:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: aceba397279031ce13a60d73605446b8 SHA-1: 3ad970d976b9bc0ce2f6a78a978442ba83c7cdde SHA-256: 9a26217693f813c8674e09f11141a982cb17959f70a62fc9851e625794171f4c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan-like behavior. The document contains a link farm pointing to compromised WordPress upload storage and other disposable hosting sites, disguised as a free Tamil ebook. The primary purpose appears to be redirecting users to malicious content through a series of links.

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 https://szallas-karpatalja.com/upload/62267903426.pdf In PDF document text
    • https://flomogroup.com/upload/files/debusowusigi.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/53978696676.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16135b40194c32---pewosatarolakutu.pdfIn PDF document text
    • http://mjengo.org/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/jakagivufogusugobupinaziw.pdfIn PDF document text
    • http://restaurant-lyons.fr/userfiles/file/54626723704.pdfIn PDF document text
    • http://associatedreclaimed.com/userfiles/files/81812216279.pdfIn PDF document text
    • http://kolkandkolkdesign.com/site/data/ws/files/45743756310.pdfIn PDF document text
    • http://dlshixiang.com.cn/ckfinder/userfiles/files/5701429666.pdfIn PDF document text
    • https://soosekszer.hu/upload/files/57581369197.pdfIn PDF document text
    • https://polymadeniyaglar.com/fckeditor/userfiles/file/loremapedabagodaluvo.pdfIn PDF document text
    • http://vinmexindia.com/uploads/96197535897.pdfIn PDF document text
    • http://jhdjt.com/images/upload/File/31528870778.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/70678755204.pdfIn PDF document text
    • https://jeanmarcrobion.fr/userfiles/file/37338129493.pdfIn PDF document text
    • http://www.saito-ken.jp/userdata/file/92664437250.pdfIn PDF document text
    • http://okvin.org/userfiles/file/madadi.pdfIn PDF document text
    • http://modernplating.com/userfiles/file/derefezikofavovaguxabib.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/xanamogeg.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/8a14b0a966e70f8fab6d4c40c54b8291/nusaweseno.pdfIn PDF document text
    • https://clubkdo.fr/img/pics/files/viburu.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/dovatonez.pdfIn PDF document text
    • http://fusen-es.info/yamituki-n/uploads/files/xozinokonimiwatezakurex.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/7b17da661708e74488545dadefeb9e51/lirigokafebagogeg.pdfIn PDF document text
    • http://idealhca.com/admin/images/file/68249962917.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=free+tamil+ebooks+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d59b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD59B 10764 bytes
SHA-256: 56c5a128b2b14744e57f5fe7730d7e566d8dc140a1e4da652553be20f181a910
font_01_sfnt_off0000ee22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE22 17176 bytes
SHA-256: e08aadf54859790b95e2edccedb1d8720f0331aae19704532b0f8d4411dabfbf
font_02_sfnt_off00011af2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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