Malicious PDF — malware analysis report

Static analysis result for SHA-256 8182bb6250998099…

MALICIOUS

PDF

83.2 KB Created: 2021-09-13 03:46:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2ba95567dc3a944dd81e7fd38c201d0a SHA-1: 2bb17e4f3f78053bb934fc65fea7525982841ff5 SHA-256: 8182bb625099809966e999fb32fe0dc710a2bad339f7c2aa7116d1e7534c7965
134 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.alapan.org/fckimages/file/gadugilopefipewirubotij.pdf In PDF document text
    • http://mingzhicc.com/userfiles/files/34668888544.pdfIn PDF document text
    • http://vikingpaint.com/user_file/file/8302957735.pdfIn PDF document text
    • http://medtravel.pro/images/hand_uploaded/files/4515939496.pdfIn PDF document text
    • http://sure2trips.com/bot/ckfinder/uf/files/nitugifuxuz.pdfIn PDF document text
    • http://ain.proximeo.com/ckfinder/userfiles/files/poretiguzajabaveme.pdfIn PDF document text
    • https://krossi.ru/images/content/files/29415516825.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/tapufugetupuxasasigeji.pdfIn PDF document text
    • http://playeasypiano.com/resources/fck_images/kipigivejixutewusorar.pdfIn PDF document text
    • https://congchunghadong.com/uploads/files/46903715878.pdfIn PDF document text
    • https://xn--fiqa735be48e.com/upload/files/33228012853.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/kerukexekoserobaxovo.pdfIn PDF document text
    • https://andhimazhai.com/images/files/sibefexolosevisupibefe.pdfIn PDF document text
    • https://777mto.info/contents/files/xufofugefuruzilegusip.pdfIn PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/87591324870.pdfIn PDF document text
    • http://cleanyachts.it/writable/public/userfiles/file/jumelulobep.pdfIn PDF document text
    • https://questyme.com/userfiles/file/komukorot.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612f26081c47f---wolifalopetemexul.pdfIn PDF document text
    • https://xn--interpeas-r6a.es/upload/files/88170863036.pdfIn PDF document text
    • http://ucg-eg.com/userfiles/file/67954576761.pdfIn PDF document text
    • http://terezszilvia.com/images/uploaded/file/57399276540.pdfIn PDF document text
    • http://dangkykinhdoanhkiengiang.com/upload/ck/files/16736812210.pdfIn PDF document text
    • http://fd-health.com/upload/ckeditor/files/musuzunedojozumobuwiro.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/xulatalafuxizuliwutel.pdfIn PDF document text
    • https://ville-saintleonard.fr/pdf/21876611707.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=app+dot+apkPDF 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_off0000e0bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BF 9816 bytes
SHA-256: 38f23d84d999c08db054d9b022f9229127d6a1ff99ff8dd6abaf30f5a9bc6b22
font_01_sfnt_off0000f667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF667 18692 bytes
SHA-256: a36c04f2bc701b2e7c5f8e5c3b43f3dff285880a53d14e644769887aa7126bba
font_02_sfnt_off0001275f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1275F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1