Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d6c744a44cf7f05…

MALICIOUS

PDF

78.6 KB Created: 2021-09-13 15:32:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 07080556799c3a0aaf3bdd8fbca915bd SHA-1: 937572c921308f5a52c5115ff4ea61beb07610d3 SHA-256: 0d6c744a44cf7f0535f190ad5849998fa911862e60373fb1372482fcfbf7a97c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous embedded URLs, many pointing to unknown domains and structured as a link farm, suggests a phishing or malware distribution attempt. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further supports this, indicating the document is designed to host many links on disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/54bc0e96da94b2a73b018d272658f374/kifuzozofunapevubagotu.pdf
    • http://jpind.pl/userfiles/file/7095162685.pdf
    • http://rentaruedas.com/files/others/80802741055.pdf
    • https://cardion.dk/gfx/fckimages/file/midavasumovoxibiz.pdf
    • https://underworldgear.com/admin/images/fckImg/file/56433040712.pdf
    • https://xn--nmqu14inmf.com/upload/files/gofilowavudixivododa.pdf
    • https://imagebrandstudio.com/userfiles/file/53089986830.pdf
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/1426816816.pdf
    • http://zubrcup.by/files/files/lopedefikogexeduso.pdf
    • http://jysfh.com/upload_fck/file/2021-9-4/20210904121552581342.pdf
    • https://nabsangram.com/userfiles/file/33773038401.pdf
    • http://iccarrentals.com/files/file/vatoj.pdf
    • http://prompol.com/media/file/25351513120.pdf
    • http://magdrywall.com/project-new/christianbook/upload_images/file/domoralafubuwunapuboz.pdf
    • https://karolinanowak.com/userfiles/file/kerojilolezidokakibezet.pdf
    • http://abwcrainhwy.com/uploads/files/ruzefuxemunenutipumawa.pdf
    • https://borgopitti.it/userfiles/file/4711851744.pdf
    • http://king-pro.com/userfiles/files/84876996983.pdf
    • https://softwebstar.com/shop/userfiles/file/65239548600.pdf
    • http://intranet.uts.edu.co/portal/app/ckfinder/userfiles/files/58490607605.pdf
    • https://himalmanpower.com/ckfinder/userfiles/files/rivavukolividawegixixil.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613e9c8846e99---98600095597.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=download+harvest+moon+for+ppsspp+android
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7b9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B9 16792 bytes
font_01_sfnt_off0000dfd0.bin
013d974ec5de58a4d3506452ae6311092de55d694d43bd5dbb55b413bb23482e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD0 10916 bytes
font_02_sfnt_off0000f8ee.bin
ab637cc0b3a533c0c4cb48263a5492951d95c34c037ea8f1c31a9bddbad90e33		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EE 19980 bytes

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