Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e7b35a5745c2b4c…

MALICIOUS

PDF

102.6 KB Created: 2021-06-23 03:20:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5ab4b7fd3144aed1a8cfcba3bba4e573 SHA-1: 10dc4c0882a659561fdb77089d5052c0dc5d9783 SHA-256: 5e7b35a5745c2b4cf2b371a96953ecc3660100443e06d2e585b3f40ea845f4d8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm for phishing or malware distribution. The document body, though heavily obfuscated, contains references to 'karaoke mp3 download', indicating a lure to entice users to click on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 https://laborke.ru/uplcv?utm_term=sairat+zala+ji+karaoke+mp3+download PDF link annotation
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/d310aedd1c26ccc54fb62fb33cef88a8/dewokuwamewuserebetexab.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bde929df52d---30919637339.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/nibafabow.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/0fe1adfac3865eb16695e19f4eef591a/gaxevawozowu.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/qb6picsib6r1lbc6r3jtlulifa/57421034716.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/vhm835ap7rjvpgrk8e2njbf8ac/zovux.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/getidafekifazavo.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb7a2b1b0e---wunebukovip.pdfIn PDF document text
    • http://status-go.net/gfx/userfiles/files/20723287261.pdfIn PDF document text
    • https://remoteyourstaff.com/calisma2/files/uploads/20432197947.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/4296441886.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d058236d1---pefijagunidezafare.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/86e39d461f90812fca77099775299eee/2467594708.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160835ee3e209d---73641578075.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/5neb1hqakhulmgj9gtfp372h1v/11688992395.pdfIn PDF document text
    • http://www.adarshvidhyasankul.org/userfilesfile/58170133227.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16080bf950efcc---47385408665.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/22f399346651ef901cf8d17277654125/85474082302.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012d02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D02 5476 bytes
SHA-256: 584589dd6828c3e5058702847bd972c79479a95665eb4ca3575aff5809233747
font_01_sfnt_off00013faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FAA 11268 bytes
SHA-256: 5d8c1ad388cd65853cff217656e1f751ec31ae4a2ff602ae1ebe824fa355fed3
font_02_sfnt_off00016655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16655 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3
font_03_sfnt_off00017ba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17BA6 4696 bytes
SHA-256: 733214533eb4778c34c038bc9b19ce31a3bb30369f2c1fbddc3a91dc6a64b643

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