Malicious PDF — malware analysis report

Static analysis result for SHA-256 5307cd5945b285db…

MALICIOUS

PDF

84.7 KB Created: 2021-09-21 06:46:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 90d0c020bd8424d648e57a9962f5ea95 SHA-1: 7c6f462ed5a01119359d28e84b596314e4b03498 SHA-256: 5307cd5945b285dbbad3f2884cb4e09df1bdd49573ca5767e9c885a17a7ddcd6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document contains numerous links to disposable hosting, suggesting a tactic to distribute malicious content or phish for information. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.
  • 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://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7735c653c---17904656948.pdf
    • http://blankheich.de/images/uploads/file/fopitujunujaxelomu.pdf
    • http://stellarvvv.ru/ckfinder/userfiles/files/xapinaw.pdf
    • http://eg-connect.com/uploads/editorfiles/file///22185631618.pdf
    • http://sukhonthip.com/file_media/file_image/file/89731286805.pdf
    • http://stardentalcare.org/userfiles/file/68301526113.pdf
    • http://icareonline.net.au/ckfinder/icare/files/varobiguzafuvixabev.pdf
    • http://orsini-blasioli.it/userfiles/files/16159182688.pdf
    • http://yung-shun.com/userfiles/file/zozed.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6ac88f428---69556051986.pdf
    • http://kovovyroba-nosniky.cz/UserFiles/File/fanofokifuf.pdf
    • http://dga.gr/ILC/img/file/wevaziz.pdf
    • https://oteaexpert.fr/cite_imgs/file/wizowejanexi.pdf
    • http://veganogle.es/uploads/ckfinder/files/39313538016.pdf
    • http://sns-russia.ru/userfiles/file/kebunezofisabogatajesese.pdf
    • http://duquenne-moteurs.fr/webroot/upload/files/mijarinevavujudirabele.pdf
    • http://446888.top/userfiles/file/62356236698.pdf
    • http://cesarrodarte.com/userfiles/file/sadowoxixefonogodif.pdf
    • https://maryamghiasi.com/images/upload/files/nukenul.pdf
    • https://bela.geekers.tw/upload/file_folder/file/85770899520.pdf
    • http://seattledesis.com/fckeditor/file/kavuxegeresedagimuzen.pdf
    • https://brukspec.pl/upload/file/zetolalebisaguvujib.pdf
    • https://designmaster.in/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/zojaxipijezixafimatexu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=app+similar+to+whatsapp+for+android
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7f2.bin
42020f80d0f7471d9922de59da452e0b049ebc1075954037a25b9d8789e010d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F2 17232 bytes
font_01_sfnt_off0001147a.bin
b000fe05b983aec024e7552dd75f0fb398510b4b75bd0b4571c210120a402421		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1147A 10696 bytes
font_02_sfnt_off00012ce1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE1 16792 bytes

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