Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ae2e6a345c194c0…

MALICIOUS

PDF

77.4 KB Created: 2021-09-10 11:05:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 29ec384a9e6c8ef5e7ed2aa8755e0462 SHA-1: 40bb0f26e8063ccf8277bd576948f15601fb04db SHA-256: 5ae2e6a345c194c0270bad313aa885ad11c6d16fd5ab738ffaff970f3f848590
156 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 pointing to potentially compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution lure, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://hanifeugur.com/image/files/81119603297.pdf In PDF document text
    • https://daaeportrett.no/upload/file/rirurobepalotugitin.pdfIn PDF document text
    • http://marcus-1.com/FileData/ckfinder/files/20210908_99E99CB27B764587.pdfIn PDF document text
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/32585771996.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161383d8173c01---tiferevipax.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132057dacfc9---kowanisaxowijovi.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/guwivatofe.pdfIn PDF document text
    • https://chennothinterios.com/uploads/file/14806022578.pdfIn PDF document text
    • http://sntaviator.ru/ckfinder/userfiles/files/83249696737.pdfIn PDF document text
    • https://duragloss.pl/userfiles/file/17840727505.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///71337599709.pdfIn PDF document text
    • http://demo-enriquemora.shopcloud.es/ckfinder/userfiles/files/jogenewuruv.pdfIn PDF document text
    • https://pfollowers.com/ci/userfiles/files/xufexowazopeledo.pdfIn PDF document text
    • https://malayalamfoundation.org/admin/my_files/file/tinimolutazoge.pdfIn PDF document text
    • https://pfollowers.com/ci/userfiles/files/59045543369.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/20471867761.pdfIn PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/85146502947.pdfIn PDF document text
    • http://dekobonner.de/userfiles/file/disunafila.pdfIn PDF document text
    • http://rc-modeller.se/images/file///xevutopefesoxa.pdfIn PDF document text
    • http://donghozibistore.com/luutru/files/32747045983.pdfIn PDF document text
    • http://sdsenlex.com/upload/files/95318365563.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/72132373828.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/fntnk4mfdj83g0dla2fnp8qla2/tidabajirofukoxobinizo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=2020+hsc+maths+formula+sheetPDF link annotation
    • http://cluster006.ovh.net/~greeters/namur/ckfinder/userfiles/files/xuvor.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_off0000c4ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4CE 10652 bytes
SHA-256: 81b940cbfc8fe94f6c4f8f4aceb95f67d6421c87878aab6232c217b64eb58578
font_01_sfnt_off0000dd46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD46 19400 bytes
SHA-256: f1d168e1f0b5367628d69d977c7c126ef7770c7f98d47dfee298ac36ee55fcc9
font_02_sfnt_off00011031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11031 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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