Malicious PDF — malware analysis report

Static analysis result for SHA-256 d33e487d8ad74659…

MALICIOUS

PDF

86.4 KB Created: 2021-09-17 03:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 26dcdc9a2e36c11dc40eefaf715a0a73 SHA-1: 3883746d7bef0f7d4179bb7e66e8175c05036017 SHA-256: d33e487d8ad7465976d935bfcdc18f2bb8b000b7797e75bed6cad1d6900dc2f4
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. It contains numerous embedded URLs, many of which point to suspicious domains and are part of a link farm, suggesting a phishing or malware distribution scheme. The PDF structure and embedded content are consistent with attempts to disguise malicious links or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://ipceurope.be/assets/file/45923203206.pdf In PDF document text
    • http://citescolairedeledit.com/include/file/nopaz.pdfIn PDF document text
    • https://soccerauquebec.com/userfiles/file/lexofunomasabumuxazo.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/91695409821.pdfIn PDF document text
    • http://rurisnet.org/images/file/fimaparamaburedawak.pdfIn PDF document text
    • http://tw-jia.com/uploads/files/202109051536415323.pdfIn PDF document text
    • https://masini-de-ambalat.ro/images/userfiles/89056450911.pdfIn PDF document text
    • http://krr-nfe.com/suratnfe/UserFiles/File/didetoxejiwu.pdfIn PDF document text
    • http://zae.me/datafiles/file/vizenovufeweba.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/24110774617.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/bixuzi.pdfIn PDF document text
    • http://kirakuramenandsushi.com/uploads/files/kijafipomuluxusivuwowuga.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/popigexiwemelibinajapejes.pdfIn PDF document text
    • https://nabsangram.com/userfiles/file/welikitavexixizu.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/files/92966545612.pdfIn PDF document text
    • https://kapokcmassage.com/uploads/files/202109121236342833.pdfIn PDF document text
    • https://skvely-kup.cz/files/file/lejobowevizugod.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/qvhc1t7d9beftl5vpg3g1ipa47/lukurozonanarox.pdfIn PDF document text
    • http://kleinschadenexperte.com/userfiles/file/13745528575.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/94138143095.pdfIn PDF document text
    • http://mzch.pl/userfiles/file/67036628951.pdfIn PDF document text
    • https://aslplastic.com/ckfinder/userfiles/files/jovos.pdfIn PDF document text
    • https://srldirect.com/ckfinder/userfiles/files/lijoxisuf.pdfIn PDF document text
    • http://xn--80aguejfegacgj0ad.xn--p1ai/pict/file/gatinijap.pdfIn PDF document text
    • http://formpart.com/upload/ckfinder/files/daxodugagirig.pdfIn PDF document text
    • https://sintasyapi.com/img/userfiles/file/xogavogizolejezaki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=bonitinha+mas+ordin%C3%A1ria+2013+onlinePDF 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_off0000e0fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FE 21508 bytes
SHA-256: f615e9e4091cf57e54fabe9893d4fa4ebf24efa5a333cb8ef4017dab2963abee
font_01_sfnt_off00011758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11758 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F6F 11212 bytes
SHA-256: 4950ea200806cbd26f1c9f540d2eb0e23c8dbfb4db152e9893af431f5a68da2a

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