Malicious PDF — malware analysis report

Static analysis result for SHA-256 887eca1e66cc5dc9…

MALICIOUS

PDF

81.2 KB Created: 2021-09-07 06:28:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: cd83733e42290d84b39141a2ba3b6ff7 SHA-1: a2742f4574878cbc1bee4cb9358cb327ba6a2f24 SHA-256: 887eca1e66cc5dc920d424453e4fa8c17897d79948641be06b7f51cf0338050e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised CMS upload storage, suggesting a lure to download a password-protected archive. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure and heuristics suggest a phishing or malware distribution attempt, likely involving a password-protected archive to bypass gateway scanning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • 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://arnetbilgisayar.com/upload/ckfinder/files/xukirawajap.pdf In PDF document text
    • http://share-world.tw/userfiles/file/77529356644.pdfIn PDF document text
    • http://j1medical.com/uploaded/file/ranududopeki.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/boren.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607119e3c53f7---9801675627.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e9455fd408a---58947663810.pdfIn PDF document text
    • http://matkinhantai.com/luutru/files/kozav.pdfIn PDF document text
    • http://viswinkelindex.nl/images/uploads/98105076948.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/10387232619.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/gizow.pdfIn PDF document text
    • http://biosurfest.com/userfiles/files/jopovetiragodema.pdfIn PDF document text
    • http://cattaneoarchitetti.it/userfiles/files/tobumuw.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/71679073127.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/12266644130.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160798fc40fbff---22196360401.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/31614899929.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609368f6eaba0---begonufewamopibe.pdfIn PDF document text
    • http://kaushalacademy.org/ckfinder/userfiles/files/kulufenuw.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/6d1dd36b7bf5f7857c1a3cbab3d68aaa/90713176037.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/jekelasibipafamoduz.pdfIn PDF document text
    • http://elise.pe/images/file/75742221768.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd0d0f2311---tumaw.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160dad7a553b32---77825839401.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096581818132---wuzivonipurowosobalugo.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cafa13c479---tunikes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=biased+unbiased+worksheetPDF 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_off0000d823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD823 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f03a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03A 10768 bytes
SHA-256: 4b143bd7bb8367c8a4012f932fb1a056a25025a455b491f5aa33333b562e0f08
font_02_sfnt_off0001090b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090B 17756 bytes
SHA-256: 951d214c42acb0a5894ba52b5e1100ba03b297d8f5ecbc04f26a8369990eaf36

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