Malicious PDF — malware analysis report

Static analysis result for SHA-256 9325452992cb1376…

MALICIOUS

PDF

88.2 KB Created: 2021-07-19 06:07:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 55968bea31e19e4e31a52c1f1b6b0c2d SHA-1: 63f513b12ac6dcb2df0a027c7debc1323bd2f9c2 SHA-256: 9325452992cb1376bd92179eca7b43099b299c94f15279b1b29c1995858edf62
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 disposable hosting or compromised CMS uploads, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • 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://pensjonatagat.pl/userfiles/file/xerebidegade.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711fe713997---68679972965.pdf
    • http://tpokebar.com/uploads/files/59117213256.pdf
    • http://zlato-invest.cz/upload/files/savebu.pdf
    • http://goodmix-psc.com/userfiles/files/sasowinotasotixipedipofow.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f750e0a7f---35233325474.pdf
    • http://wohingltd.com/userfiles/gifemupatekanu.pdf
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/gipipubemen.pdf
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/129e4ccac35e45510f5670d52ae410d3/mibewa.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f61e9c5da6---vizododiderowetevex.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/9v8duv789s467f4qbamdakra75/juxumaroburo.pdf
    • http://rockpapersun.com/upload_mce_image/file/63849655837.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608333beb70b1---ragokejukizodepaxovelu.pdf
    • http://alpha-th.com/userfiles/file/75895432978.pdf
    • http://steelbo.com/uploads/admins/u0/files/20210620172632.pdf
    • http://rosritual.su/app/webroot/js/ckfinder/userfiles/files/kuletokosadugakinoko.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/0f38f8e88bf7d6eb16118e1cfce2cda3/sibatikidizugezi.pdf
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1606c994dd903b---febewe.pdf
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/eef6cf86c9bcc554f838a4d150b98743/zujokezonulajutututimobi.pdf
    • https://marblobaths.com/app/webroot/img/files/57554226179.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/1c309f8b186e970c8a632cdd809c244a/14891491453.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bedad6a7e8b---lapekogopeligibiviludo.pdf
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/7449190cd84f56f35964dc63751cfe9c/tukivujo.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8744ae0ae---30989175049.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a35e07491a251d5be5cdd7c5206f4fd4/dubebukugeduvuwudogenu.pdf
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/b435dc0fa9628c98a41093c540f4a875/lulolape.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=osrs+ape+atoll
    • 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_off0000f80a.bin
1759b08efb79198ed20e05b3d59f9147da461b80a89af8ed801ec2d0564678c5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF80A 17240 bytes
font_01_sfnt_off0001252b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1252B 16792 bytes
font_02_sfnt_off00013d42.bin
3f88f317752125b028947df89250aacfcc8d2e68a8548e08f6b3ee96da8377a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D42 10072 bytes