Malicious PDF — malware analysis report

Static analysis result for SHA-256 008882e545c86388…

MALICIOUS

PDF

80.0 KB Created: 2021-09-07 17:44:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 59816e81193e3778d24f35b832fbc371 SHA-1: ac1dbed79608878bbaa906f24c735ed18a2d1ba8 SHA-256: 008882e545c86388400e30e487273e445be34b89f5feba3cee4e9ba518a408a4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded JavaScript likely facilitates the redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://jpbullies.com/clients/2/2c/2c827f09d77a589c2c5c7da8c033a3f4/File/wimozivizovurolatag.pdf In PDF document text
    • http://hphs1958reunion.com/clients/47465/File/45833309887.pdfIn PDF document text
    • http://eventclub.pl/userfiles/file/35205637802.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/sak17tf3p65h1lvh55c71oi701/41952351243.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a84b5891dd6---razajidolema.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/77413971027.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/88515956315.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/161126d909c51c---tupobigujegopiresegalafap.pdfIn PDF document text
    • http://kaizousha.com/js/upload/files/maradogupogelasosukode.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e838ab824c---99683157110.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bf7b9aa586b---26740017615.pdfIn PDF document text
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/63224729089.pdfIn PDF document text
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/boviwutuz.pdfIn PDF document text
    • http://kaizousha.com/js/upload/files/93600774093.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/jutukoti.pdfIn PDF document text
    • https://akita-inu.lv/www/files/files/wubekatakunopus.pdfIn PDF document text
    • http://ebrinteractive.com/userfiles/file/jekexinejedim.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c75f4a6e94---zajilavus.pdfIn PDF document text
    • http://ashioke.com/images/library/File/xafesegutubitofa.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/zusuzepodibo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=econometric+analysis+of+cross+section+and+panel+data+2010+pdfPDF 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_off0000d4dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ecf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF4 11172 bytes
SHA-256: 22e60596cc3f3359c7dae6b129afd82900ad317e6164ddaad461c960fa78408f
font_02_sfnt_off00010722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10722 16656 bytes
SHA-256: 88209725ee03212de33a86a2d81016d57443cb40dcde742358e968e2f4e50e9f

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