Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecaab56780c5dab9…

MALICIOUS

PDF

77.0 KB Created: 2021-09-01 08:05:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 18418a4f2a851519bd9106ff8db698ab SHA-1: f81088481319c0b9e0f5d0abbf85e2d0cb33e0ee SHA-256: ecaab56780c5dab9954e2fe2b6a65e222376080de67b8d53d2c36561caec4758
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL structure and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 http://hpc1970reunion.com/clients/3/3e/3eb4c5728feca7eb79feed4eed44c519/File/begolesama.pdf In PDF document text
    • http://kuwaited.com/cote_dor_import/admin/ckfinder/userfiles/files/68578596699.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1611bbec33b1e5---60672402025.pdfIn PDF document text
    • https://roomart.uz/ckfinder/userfiles/files/rixanetufekafixokexazujuj.pdfIn PDF document text
    • https://khonggiansangtao.com/platformecom/img/upload/file/2464902895.pdfIn PDF document text
    • http://kleinschadenexperte.de/userfiles/file/zetiruzubekuxekibisuduweg.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/72738581400.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/62158860679.pdfIn PDF document text
    • http://cansuyu.org/resimler/files/74972932740.pdfIn PDF document text
    • https://xn--80apefbdm9ah5g.xn--p1ai/userfiles/58955831059.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607be6862d76b---42074417013.pdfIn PDF document text
    • http://freetds.net/userfiles/file/57952475682.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f861ee99c1---9098959700.pdfIn PDF document text
    • http://jplus-ag.com/upload/files/BodyFile__60CBE4E7781A9.pdfIn PDF document text
    • https://digireg.it/upload/kamukedore.pdfIn PDF document text
    • http://drshapard.com/clients/73598/File/jiwajonipenedoxukebam.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/aea2c558a3f81b18f87df58ac8859fd3/60926755207.pdfIn PDF document text
    • https://electrabicycles.pl/app/webroot/uploads/file/16214666700356.pdfIn PDF document text
    • https://romalasergroup.com/userfiles/files/77073107282.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160943ed4c3428---73901742770.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/15747425238.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/91216712734.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/onsvracddggelalpiprdt1ktbj/puvonaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=8th+class+english+my+mother+poem+question+answerPDF 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_off0000c475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC475 17908 bytes
SHA-256: 33076aedb21151ca4dab75d78f74f16af2515f04e8fdac65aabaf7ed225b8c64
font_01_sfnt_off0000f2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D3 11376 bytes
SHA-256: 00cf55023741998a7a9bfd0bb1801d978391119cfdd50d59c00d454c23717dcb
font_02_sfnt_off00010d3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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