Malicious PDF — malware analysis report

Static analysis result for SHA-256 522969f0d64da2f6…

MALICIOUS

PDF

80.5 KB Created: 2021-09-18 20:14:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 574ddba906e62ef0f7a028d8f5f7e185 SHA-1: e559e919d2936c89e99d72695c87805ae87ca368 SHA-256: 522969f0d64da2f6013a5ce608e59787c1df9d288801198106970c3b21bd010a
164 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. It contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised CMS upload storage or disposable hosting, forming a link farm. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are designed to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://oniceh.ru/uplcv?utm_term=free+gems+in+hungry+shark+world PDF link annotation
    • http://dakmet.pl/upload/gelunufizuzetazupulagipan.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/v8clbp5iv7nhsi5fd88qit9cdb/zawudoxuv.pdfIn PDF document text
    • https://seedcambodia.org/htdocs/cljr/data/files/68570347121.pdfIn PDF document text
    • http://swiftnb.com/ckfinder/userfiles/files/ridufeperaregi.pdfIn PDF document text
    • http://vektorma.ru/uploads/assets/file/51222863913.pdfIn PDF document text
    • https://inprovitcentroamerica.com/ckfinder/userfiles/files/61218613958.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/374f40042d12141cc4f1fdac5073c9cc/53787580145.pdfIn PDF document text
    • http://rama-sp.com/rama/webroot/js/ckfinder/userfiles/files/toxirofuseba.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/wawop.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/98510561364.pdfIn PDF document text
    • https://bocion.com/ckfinder/userfiles/files/jagakusenigulupivomuvewe.pdfIn PDF document text
    • http://printrun.nl/userfiles/files/xuwerew.pdfIn PDF document text
    • http://bergepkolcsonzo.hu/userfiles/file/27692897425.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/maxilerupiguwiv.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/dilafinixagezosigim.pdfIn PDF document text
    • https://akconta.com/uploads/files/tasax.pdfIn PDF document text
    • https://www.sudoku-cool.com/ckfinder/userfiles/files/28875133591.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210912095534_1963156273.pdfIn PDF document text
    • https://mcq-exambd.bdbabymart.com/app/webroot/ckfinder/userfiles/files/zamirogoku.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/ujcbda71boqukth1jgtt3crosd/59233801588.pdfIn PDF document text
    • https://www.temtechnologies.fr/ckfinder/userfiles/files/22673817413.pdfIn PDF document text
    • http://rootbeadmill.com/upload_fck/file/2021-9-8/20210908064731250408.pdfIn PDF document text
    • https://speculatio.in/userfiles/file/30175700020.pdfIn 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://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_off0000d164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD164 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e97b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97B 10964 bytes
SHA-256: 3b49b032c7b425c3fdd53bda50297e0790e2a7aeed337733b3a37fde1900706c
font_02_sfnt_off00010283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10283 18760 bytes
SHA-256: 0154ca24cd9ce9de9f2b8501395dc7557021fba0fbdd9fd4a16d3aa11db2cfdf

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