Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0554616ee4368fa…

MALICIOUS

PDF

89.7 KB Created: 2021-06-29 06:54:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 08640959c52c550204a8bdc468af7a68 SHA-1: 5f58f456f68f10a45d2dc215061bf476dad541dc SHA-256: d0554616ee4368fa75321d6cbdbc340a5804feb9805479ff7cf04a87084f2a2a
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a link farm, directing users to various compromised upload sites, and employs an urgency lure. Crucially, it also signals a password-protected archive handoff, a common tactic to bypass gateway security and deliver encrypted payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://irths.com/upload_files/files/47470400123.pdf In PDF document text
    • https://gencshoworganizasyon.com/upload/ckfinder/files/39028060954.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf379592476---dosuseduluzemexegejamesad.pdfIn PDF document text
    • http://laser-piskovani.cz/democms/userfiles/file/lodudugi.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/acpaokvlg85nbp56vst15o16ic/94682894083.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/vonc4rm0vh98t3mavugjsjdkc7/xuzokejalaxari.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a40427e29b3---26593391455.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/40763aaabf154373f767a4b97d1fc487/pejev.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/ad32911fd40ce9c814139a12033ad8f6/kakawurumivo.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/6005982531.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce363e966b---ditifef.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/v7l5n22hictf4tslieej1dm1tf/ropugegu.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/68a5b7243569cc84406ee8818bc1d74e/zanividem.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/99n8f18vi01a8aq504es22fkb2/18135053531.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6651a5f535---43306074673.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/41725133332.pdfIn PDF document text
    • http://hotelbelleepoque.bg/userfiles/file/tetowowi.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/mapadodovenetom.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/ripipevoreru.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/jotamubuluviludob.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/l10d9lqv30chkb27kqsu4ui6d6/vaxabujikazomavujudazud.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608586306dac7---98600427379.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/34f9a339671b62036b5a2c6886d9741b/buwipakomilowisunete.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/11666843303.pdfIn PDF document text
    • https://rosycaffe.com/file/70462235887.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=final+cut+pro+x+compatible+with+high+sierraPDF 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_off0000f698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF698 11224 bytes
SHA-256: df313e7b0f65ef795a2b1e97fb570b76769f81a21a9017512962a3e35c712b56
font_01_sfnt_off00011093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11093 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A5 18800 bytes
SHA-256: 252e36517bb5694f5735abddc38303d88418fa290a51f8aa516bf5aa7e894fcc

Open this report in the interactive analyzer, or submit your own file for analysis.