Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da2c27ce75d0f5e…

MALICIOUS

PDF

73.9 KB Created: 2021-10-10 21:25:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6cfe262de94e9779dd1d8a5e1398ab11 SHA-1: 64a8038efb9330b244f737ad78fc1c0ea637ade6 SHA-256: 0da2c27ce75d0f5e7dd99f599740f151e394a4405430b3ec8f0d48cbd262eb54
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. The embedded URLs point to various PDF files, reinforcing the link farm characteristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://globalbando.com/DATA/upload/files/202109060314461398.pdf In PDF document text
    • http://sun-eko.eu/files/file/37229205754.pdfIn PDF document text
    • http://quaisetoiles.fr/img_pages/file/juvokewakorom.pdfIn PDF document text
    • http://abcbyspu.com/ckfinder/images_store/files/18172063941.pdfIn PDF document text
    • http://secondhandgraphics.com/usrfiles/file/dikedigolovelexokezo.pdfIn PDF document text
    • http://lustigersteirer.at/userfiles/file/rovozimizizivutene.pdfIn PDF document text
    • https://scmsgroup.org/ckfinder/userfiles/files/44787034778.pdfIn PDF document text
    • https://vipbeachhouse.com/uploads/editor/file/98177513859.pdfIn PDF document text
    • https://ifunb.com/shopadmin/upload/files/13090558056.pdfIn PDF document text
    • http://vietnam-intraco.com/webroot/img/files/86640378941.pdfIn PDF document text
    • https://betamachinery.sa/other_files/File/wavoxenuneked.pdfIn PDF document text
    • http://www.hausbaumesse.at/ckfinder/userfiles/files/xedizedip.pdfIn PDF document text
    • https://esperidiaogomes.com/userfiles/files/vaviguxavupaliradi.pdfIn PDF document text
    • https://www.mediawerf.nl/bundles/store24backoffice/ckfinder/userfiles/files/pojejis.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/fizagunagofirolulawakibi.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614248abb03ae---rikidefolumufaraxivege.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/lofodopatidunugideno.pdfIn PDF document text
    • https://globalybm.com/ckfinder/userfiles/files/1633564257.pdfIn PDF document text
    • http://penzion.sarmo.cz/Images/file/27793423045.pdfIn PDF document text
    • http://mastrodibaglio.it/userfiles/files/67721589760.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=nothing+ever+can+nothing+ever+will+chordsPDF 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_off0000bdd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDD9 16948 bytes
SHA-256: 26141993ab0f96c1704c81c0080f29dcb7ed050bb6f66dac1286b4d094406d19
font_01_sfnt_off0000e957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE957 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001016e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016E 10780 bytes
SHA-256: 4456e5147db541bd7f9815ecd39a20325b6d7630a18ee351489791b764c03781

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