Malicious PDF — malware analysis report

Static analysis result for SHA-256 160e2adae93b4c39…

MALICIOUS

PDF

69.6 KB Created: 2021-10-04 20:35:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bfe5b79e8599daf79db09235b2a9437d SHA-1: b01dbb084b0b4901122b84abe9186f46588b4632 SHA-256: 160e2adae93b4c397c492d66d9a8f0ebbb6c8226bb4ce671018f45730458e4c1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a strong likelihood of this document being used to redirect users to malicious sites. Although no scripts were explicitly extracted, the nature of the heuristics and the numerous URLs suggest an attempt to distribute phishing content or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://archism.ru/uplcv?utm_term=components+inside+cpu PDF link annotation
    • http://perles-del-beya.com/userfiles/file/tefugudeluxolixirijaxa.pdfIn PDF document text
    • https://aspirecambodia-edu.org/userfiles/file/wejivonavizufugifov.pdfIn PDF document text
    • https://vrindaindia.com/php/joseph/uploads/file/malenoravorasesapekujep.pdfIn PDF document text
    • http://dzirerealtors.com/uploads/19947521031.pdfIn PDF document text
    • https://ascend.sut.ac.th/ce/2017/src/plugins/ckfinder/userfiles/files/wirovu.pdfIn PDF document text
    • https://drproperty.in/userfiles/file/jesomazevofokironirumona.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/tog3dks2tqdjv0ai9suq2t8rj4/damelorutajudos.pdfIn PDF document text
    • https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/93422427046.pdfIn PDF document text
    • https://shiokuda2.com/contents/files/gijevuvil.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/4lmpehhmmnn0ulv9bhv8eksiff/23583929308.pdfIn PDF document text
    • https://kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/41993697864.pdfIn PDF document text
    • http://patrick-jardinage.fr/ckfinder/userfiles/files/dakibenaxerazibofeg.pdfIn PDF document text
    • https://uzsienis.cvzona.lt/resources/img/files/bomovunemopari.pdfIn PDF document text
    • http://slkuang.com/v15/Upload/file/20219291825568684.pdfIn PDF document text
    • http://xn--k1akb4c.xn--p1ai/userfiles/file/40372523690.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/29539046325.pdfIn PDF document text
    • http://kuwaited.com/cote_dor_import/admin/ckfinder/userfiles/files/19344653187.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/58349097839.pdfIn PDF document text
    • http://masterref.ru/editorfiles/file/22534485490.pdfIn PDF document text
    • http://twozonechickenlasvegas.com/uploads/files/dotesalokuxef.pdfIn PDF document text
    • https://tiemhoamo.tiemhoahaibara.com/data/dulieu/files/24039867558.pdfIn PDF document text
    • https://thaiahpa.com/flash/files/62631356165.pdfIn PDF document text
    • http://plkorea77.com/ckupload/files/buzilogijak.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/xazesutidakukirokidotesit.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_off0000b3b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3B7 10500 bytes
SHA-256: b2b5393c0d493b40480410cad5817433c5b0a5931c078398770e155c6c5d4f3d
font_01_sfnt_off0000cb98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e3aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AA 14772 bytes
SHA-256: 821b6c5da4d6ca83a14eb18e287e7da52c8c7bbbde2e6a16e25dac2d3588401e