Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab14048962b43bc0…

MALICIOUS

PDF

82.8 KB Created: 2021-09-02 11:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a6db1cef6c71ab7d7e51d2ea6a17b097 SHA-1: daa68527ee9801abfe122778ef9774388f898eb5 SHA-256: ab14048962b43bc040f84129cfa05ce3271f3283d245752482abcada9237fb5a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised or disposable hosting domains, indicative of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded URLs are the primary indicators of compromise, suggesting the document's purpose is to lure users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://megat.pl/uploaded/fck_files/file/85708238082.pdf In PDF document text
    • http://asu78.ru/userfiles/file/54757041528.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/31285969713.pdfIn PDF document text
    • http://premiumcsp.com/uploads/files/85934917769.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/67436809687.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/a83fd6612e34f76e8e0a2379a4faf9b9/pijukaroketam.pdfIn PDF document text
    • https://abouelhoulgroup.com/userfiles/files/wozaminotexe.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf77abfca9---51930097404.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/p62quld8urlnveenok4np1bar5/dinewam.pdfIn PDF document text
    • https://nomortiga.com/contents//files/74295254867.pdfIn PDF document text
    • http://cokhixnktientien.com/Images_upload/files/41464052546.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/99990793254.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/bf8afac7b78609f0280d61ffc8fea02b/87566556552.pdfIn PDF document text
    • http://dribblebar.pl/userfiles/file/27797872518.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/55742166979.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a10db4c3a01---bijamira.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b732a3c57---bawusazakagutaw.pdfIn PDF document text
    • https://behbehaniprojects.com/uploads/files/wesefirikaliluvifudef.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16071ebf13c094---tudaxaluwamivurolasufiwo.pdfIn PDF document text
    • http://abwalabamaave.com/uploads/files/9364990751.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/8c6d5d6e77a4ed8abf020a27d2bb13e9/37456301010.pdfIn PDF document text
    • https://kmkmekanik.com/upload/ckfinder/files/tazubetiraxujaterugil.pdfIn PDF document text
    • http://www.solarwindependence.com/ckfinder/userfiles/files/guwetibov.pdfIn PDF document text
    • http://www.sana-anong.com/ckeditor/ckfinder/userfiles2/files/53343347942.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=iadvl+concise+textbook+of+dermatology+pdf+free+downloadPDF 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_off0000db7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7C 17944 bytes
SHA-256: 718466a203cb104b6f4cafe45d7a576e045e2b3e36fcd117eb856d357141247d
font_01_sfnt_off000109f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F3 11516 bytes
SHA-256: 18298dc88e09e4bb1b1dea5a421ed6bd639a052ede97f04bef368cc1fa53c9dc
font_02_sfnt_off000124e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1