Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae8a49a5e7885897…

MALICIOUS

PDF

78.0 KB Created: 2021-10-07 12:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 32197a9a050c21226c77d35f14aee144 SHA-1: 2252f0c025c5d3e8dac0647baac6241f8202a798 SHA-256: ae8a49a5e78858977795fb0c7bcdbfd5927c567e52dc350ad5eff2374bcec5bc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to suspicious domains and are likely used to redirect users to phishing or malware hosting sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests a pattern of using disposable hosting for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://agrocare.hu/ckfinder/userfiles/files/71310097633.pdf In PDF document text
    • http://conblocmanado.com/pics/file/pemipenoxezawodugixe.pdfIn PDF document text
    • http://wu-pao.com/upfiles/editor/files/tetoxevuj.pdfIn PDF document text
    • https://mkontakt.pl/dat/file/fizejemajololuxepakuj.pdfIn PDF document text
    • http://bladensburg.abwingsmd.com/uploads/files/52209325108.pdfIn PDF document text
    • http://unsersohn.ch/images/file/17175874324.pdfIn PDF document text
    • http://titusauto.hu/kepek/file/63278155423.pdfIn PDF document text
    • http://mediaworld.pro/ckfinder/userfiles/files/bosejidodisitadofi.pdfIn PDF document text
    • http://faceconnects.com/ci/userfiles/files/7364777852.pdfIn PDF document text
    • http://space-edge.com/upload/files/kevujelo.pdfIn PDF document text
    • http://szsahsh.com/uploads/files/lenitem.pdfIn PDF document text
    • http://xn--spreewaldpension-lbben-9lc.de/meineBilderAlbertGrundschule/file/67961031498.pdfIn PDF document text
    • https://0286869143.com/editor_images/files/kaxivutez.pdfIn PDF document text
    • http://slxiang.com/v15/Upload/file/2021923515463054.pdfIn PDF document text
    • http://szjglaw.com/uploadfile/file/2021100620533873499.pdfIn PDF document text
    • http://auswallendorf.de/userfiles/file/17437286783.pdfIn PDF document text
    • http://olympicthesportshop.in/uploads/dufilezamojajubumegu.pdfIn PDF document text
    • https://www.delaneyllc.com/ckfinder/userfiles/files/fulum.pdfIn PDF document text
    • http://ydis.kr/userfiles/file/241724254044.pdfIn PDF document text
    • https://123natura.com/stockages/files/69346492424.pdfIn PDF document text
    • http://tongkhomica.com/upload/files/15093166171.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/kageruwekaxex.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/17643832658.pdfIn PDF document text
    • http://centrons.com/uploaded/file/72115002361318c2a2306b.pdfIn PDF document text
    • http://www.saaegfpolis.org.br/ckfinder/userfiles/files/69091110985.pdfIn PDF document text
    • http://www.examnotice.in/uploads/files/21552250813.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=definition+of+the+word+envyPDF 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_off0000cab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB6 10340 bytes
SHA-256: eaf45c653a2f5b280d5a2e3f503f365750d58f2e3f444b554d87975e87c574b9
font_01_sfnt_off0000e207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE207 18336 bytes
SHA-256: b130d788f31a87df8b8778d074233d595f0e6179db87a799035053af6d44d190
font_02_sfnt_off000111e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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