Malicious PDF — malware analysis report

Static analysis result for SHA-256 302ab1954af9cc27…

MALICIOUS

PDF

83.9 KB Created: 2021-09-18 16:57:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 97fac588832e98252e5914c9f06eef0a SHA-1: b5320dc034bd26948d902a9bc9c245960cbf970c SHA-256: 302ab1954af9cc27493b40c93f403f77867179503c5eecb541b51dd412785ccf
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which are flagged as part of a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and does not provide clear textual lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://piemonteforyou.it/userfiles/file/68453786684.pdf In PDF document text
    • http://ztkammer.at/uploads/file/ferifubaxedofo.pdfIn PDF document text
    • https://skl.deindrukdemo.nl/upload/files/49294448023.pdfIn PDF document text
    • http://manhchenang.vn/webroot/img/files/savixufafusej.pdfIn PDF document text
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xuboforizutu.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/panisolo.pdfIn PDF document text
    • http://alarmy-kamery24.pl/userfiles/file/21274002271.pdfIn PDF document text
    • http://haraj-alqunfudhah.com/userfiles/file/85574440221.pdfIn PDF document text
    • https://xn--80ag1a2a.xn--p1ai/files/file/66720320339.pdfIn PDF document text
    • https://xnkvinatimex.com/uploads/files/86230784969.pdfIn PDF document text
    • https://tebra.si/userfiles/file/7973428055.pdfIn PDF document text
    • http://vswet.ru/f/53938616877.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/13335855682.pdfIn PDF document text
    • https://okud-istra.hr/userfiles/file/dabaxigexokisateter.pdfIn PDF document text
    • https://drjou-vc.com/upload/files/kururupopi.pdfIn PDF document text
    • https://sgicorp.com/userfiles/files/mosotobexoromuvevobobixu.pdfIn PDF document text
    • http://knx-shop.ru/admin/ckfinder/userfiles/files/pizamewifukoxefidewozizu.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613d523968da8---65666128480.pdfIn PDF document text
    • http://shopsuathientu.com/uploads/userfiles/file/moxebifu.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/161420fdd2643b---69488661641.pdfIn PDF document text
    • https://dom4m.de/userfiles/files/lozuxewafid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+make+music+a+ringtone+on+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_off0000e34d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34D 10936 bytes
SHA-256: ccf18a384cb1b337014ef9a9b17775c9acf6c7497559b341ca9eefd4f7d889e2
font_01_sfnt_off0000fc78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC78 17416 bytes
SHA-256: 0610a169b1ee4aed092c6fab678f5e9e3bcf566fc00587f6850d73f034ee3ea5
font_02_sfnt_off000129a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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