Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2b5664cb843191f…

MALICIOUS

PDF

62.4 KB Created: 2021-10-03 11:13:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: fd6a965dc2093a67e45fe5b7c36cd6e9 SHA-1: 03e86eec7d4a4ea315abe01b386ac054e005a605 SHA-256: f2b5664cb843191f7b17ce73c206e4abd0ebe244c053858921bed8c0bac02973
102 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs pointing to disposable domains, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests the document's purpose is to redirect users to a network of potentially malicious sites. The embedded JavaScript likely facilitates the exploitation or redirection process.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4315

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://inwebjor.ru/uplcv?utm_term=modern+love+picture+this PDF link annotation
    • https://chmelo.hu/sites/default/files/file/92320975400.pdfIn PDF document text
    • http://gianenricofabro.com/userfiles/files/nizenanopolipipabobipug.pdfIn PDF document text
    • http://abwingsde.com/uploads/files/tixufoworukazelobumijid.pdfIn PDF document text
    • http://bloemenwinkelindex.nl/images/uploads/63384225400.pdfIn PDF document text
    • http://bdsductri.com/upload/files/97442876689.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614bbe0bee11c---50705708774.pdfIn PDF document text
    • http://vipnjl.com/userfiles/files/88146417889.pdfIn PDF document text
    • https://hainutedecopii.eu/ckfinder/userfiles/files/65406031232.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/duxovinesaredebodajutize.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/59111354422.pdfIn PDF document text
    • https://chilegastronomia.cl/uploads/userfiles/files/83627117335.pdfIn PDF document text
    • https://t2sc.me/userfiles/62004661878.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/bujiwis.pdfIn PDF document text
    • http://bridgeonlaw.com/filespath/files/20210916165630.pdfIn PDF document text
    • https://www.fibertech1.com/my_content/js/ckfinder/userfiles/files/31537098090.pdfIn PDF document text
    • http://luckdidea.com/ckfinder/images_store/files/74698473722.pdfIn PDF document text
    • http://maekalocal.com/Maeka/UserFiles/File/48664170340.pdfIn PDF document text
    • http://docando.es/js/ckfinder/userfiles/files/18559281242.pdfIn PDF document text
    • https://www.icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/50097160463.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/jixelovagaxedopigurazug.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/81551410153.pdfIn PDF document text
    • https://jogamiskolc.hu/ckfinder/userfiles/files/wimokake.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/60179972171.pdfIn PDF document text
    • http://sevoir.hu/uploads/file/48060509580.pdfIn PDF document text
    • https://fpcofmacon.com/nbloom/fckuploads/file/rupakovi.pdfIn PDF document text
    • https://eghamatsafar.ir/basefile/eghamatsafar/files/vafudovupexuw.pdfIn PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/6da6c217024b744310a68a2daf0c929b/78217532191.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2A8 10608 bytes
SHA-256: d8a42468296f228220d3fa0f9c228df00bc2c1f8ff7b0fccc33a1979bd3f8026
font_01_sfnt_off0000cace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCACE 14656 bytes
SHA-256: 896dade3b0ba9ce2715f8fa7045ef9b9ee9850915c9bbf48c7d4cf7269b2dadd

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