Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba942d585579abff…

MALICIOUS

PDF

87.5 KB Created: 2021-07-14 08:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: a19473c110f0c13824e80ec390abd414 SHA-1: f92b41e480a179b19358946c84e96beb630be580 SHA-256: ba942d585579abffcc92cf883f72b5eebcd5ad4fa218aafb7cc6d6e81cd5cdca
156 Risk Score

Malware Insights

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

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to distribute malicious content or conduct phishing. The document body is heavily obfuscated and unreadable, providing no direct clues to its intent beyond the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • 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.
  • 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://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b5276396400---95520848186.pdf In PDF document text
    • https://valenciamaids.com/userfiles/files/vabowibelexunapusa.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/e75e86e3adc8b4551a107ef5b921f016/xurawezunutimib.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/3402190775.pdfIn PDF document text
    • https://encoregallery.us/wp-content/plugins/super-forms/uploads/php/files/c9352ac7734669d20d1dc7fe35ee4f8f/sefidexinalitexaxosewez.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/57bca6c312369a6041f5cfaa20d033c1/63804412571.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/27a7sneh3obo5e6c5d96anaqn6/mipukibajekurixe.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/d528793ef2223aebd795146ff5fe8bc8/99702551392.pdfIn PDF document text
    • http://hongdanhaudio.com/luutru/files/15783072959.pdfIn PDF document text
    • http://rivieahk.com/clients/5/51/51325344bd1517f257d6959d5350918e/File/22658801848.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/15761116709.pdfIn PDF document text
    • http://calhi1977.com/clients/879053/File/fibizawadipasimiko.pdfIn PDF document text
    • https://smaransaving.com.np/ckfinder/userfiles/files/60911277291.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b27057c3f75---15205059291.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/benirowatizuxepotarofulip.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/85170286424.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/37187506694.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/a58d7d1982c233cc50dad472b1f6052a/14407885612.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/sawolideruxevubisibetowe.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/dutemuvawetedajiko.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a05a72423c3---bapeg.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b39bf44e909---togifolemajasikadexad.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/vvk2h2qcfiavnnrso8kqdojjd7/zulidifewinuxodokigava.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/36qpcvletig76ejhont2ljva44/39562789306.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/81ufn5eftffl4bogkkhjm7atla/gabedizajobiniwe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=claude+debussy+clair+de+lune+meaningPDF 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_off0000e28b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28B 23960 bytes
SHA-256: e156907b60829aa888a070b2a5a0513796d669e995d896051b86cf78886bf4b2
font_01_sfnt_off00011e23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001363a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1363A 10880 bytes
SHA-256: 46140a1c5f279a82bf561d2cb16b9d5f8c34714d2b2b2449adbb19eb4bdae7ec

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