Malicious PDF — malware analysis report

Static analysis result for SHA-256 0414a48f0cad9c95…

MALICIOUS

PDF

78.5 KB Created: 2021-09-19 14:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: af15eb5ad9573533de078f59c0c23414 SHA-1: a529b513e3fe79e482e1ebdc80c0cd87621e60d9 SHA-256: 0414a48f0cad9c95be515dac5fd0140f3aa5e69e7b093d491ee79cbf69687210
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links, likely to phishing or malware sites. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 https://turkuazhost.com/calisma2/files/uploads/18713115742.pdf In PDF document text
    • http://copy-office.it/userfiles/file/gemunonategedar.pdfIn PDF document text
    • http://www.szphotar.com/admin/img/files/siwuziren.pdfIn PDF document text
    • https://olterus.com/contents/files/906731555.pdfIn PDF document text
    • http://monarchiaerembolt.hu/tmp/muzagetegaberapesej.pdfIn PDF document text
    • http://www.prakashirrigation.com/uploads/fck/files/24336518235.pdfIn PDF document text
    • http://leaders-adv.net/userfiles/file/9199152646.pdfIn PDF document text
    • https://travelinnsuites.com/nbloom/fckuploads/file/95407476746.pdfIn PDF document text
    • http://josephfellerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tazoxurowupejirajaxuke.pdfIn PDF document text
    • https://scalper.ir/data/files/file/22051385090.pdfIn PDF document text
    • https://mkontakt.com/dat/file/tozakogesavis.pdfIn PDF document text
    • http://xn--66-6kc8bfmkmjd.xn--p1ai/admin/ckfinder/userfiles/files/bijetorexatilefig.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/9fbaceda94fdf2049fb89b24d484d40b/gabab.pdfIn PDF document text
    • http://wirtrauenuns.ch/images/file/debinixalebuxamovuwu.pdfIn PDF document text
    • http://yonseri.org/userfiles/files/nimazukuzu.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/jelaxozovozaso.pdfIn PDF document text
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/zipunurovilufadadokelib.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/60771042226.pdfIn PDF document text
    • https://cheesykeju.com/contents/files/zixujuxefuga.pdfIn PDF document text
    • http://regimhotelierbucuresti.com/images/userfiles/4021876643.pdfIn PDF document text
    • http://paulabenveniste.com/UserFiles/file/diwunobefawukapemejulevar.pdfIn PDF document text
    • https://samsungklimalar.com/upload/ckfinder/files/gojetutusuxegasivok.pdfIn PDF document text
    • https://aaaxxion.info/images/file/55599643658.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=youtube+video+to+mp3+converter+free+download+for+androidPDF 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_off0000ce2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE2F 16948 bytes
SHA-256: c7bb730076455dec10b59315b5ed9e661afc57802074e107c8eea4880376f71b
font_01_sfnt_off0000f9f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001120b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1120B 11160 bytes
SHA-256: 66c565be78f980d78787e4899e3ac051dfcd39f7ffba65bed01023f1e7759e2d

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