Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5f9f7ac986ae9f9…

MALICIOUS

PDF

79.0 KB Created: 2021-09-27 13:48:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 19218b5e47e49114d479865c6c2f63a7 SHA-1: d2126431ba4e4402d1666dcbd14bade69f1c7e64 SHA-256: c5f9f7ac986ae9f9de0437e7a73df04bf154b537262a55bb0b4b38956dc99c43
94 Risk Score

Malware Insights

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

The critical ClamAV heuristic identified this PDF as a phishing trojan. The PDF contains numerous embedded URLs, with many pointing to disposable domains, indicating a link farm designed to obscure the final malicious destination. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, noting the presence of many distinct hosts and a redirector.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3353

Heuristics 4

  • 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
  • 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://dgkno.cn/upload/mopix.pdf In PDF document text
    • http://hunting.kg/userfiles/file/jowakipuve.pdfIn PDF document text
    • http://zge-led.com/luodan/images/userfiles/file/jumodomo.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/tobetelirorewuw.pdfIn PDF document text
    • http://lachambredechos.com/userfiles/file/73365882270.pdfIn PDF document text
    • http://www.kevimotor-rock.hu/files/files/dulikerabagosejiwor.pdfIn PDF document text
    • http://revize-elektro.info/UserFiles/File/xajowimakapebekufifatep.pdfIn PDF document text
    • https://limsurempat.com/contents/files/27740626391.pdfIn PDF document text
    • http://allineers.morefriendship.com/upload/files/witanul.pdfIn PDF document text
    • https://rippa.pt/files/file/kokubuvufotaberiponur.pdfIn PDF document text
    • http://avtrak.ru/ckfinder/userfiles/files/fukefikumaseg.pdfIn PDF document text
    • http://2015.letnifestiwal.pl/ckfinder/userfiles/files/5538883943.pdfIn PDF document text
    • http://jn-zhsc.com/upload/85814566632.pdfIn PDF document text
    • https://artistaone.co/userfiles/files/44409228930.pdfIn PDF document text
    • http://vivatbacchus.hu/files/file/logelaruduxatilononomomo.pdfIn PDF document text
    • http://inggeo.eu/userfiles/files/57067132204.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/72536018738.pdfIn PDF document text
    • http://obkladacstvikolar.com/content/xozopuluru.pdfIn PDF document text
    • https://bisleri.genefied.co/ckfinder/userfiles/files/3705147589.pdfIn PDF document text
    • https://primer-spb.ru/files/files/lafutoxifuxitezisar.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/91536496993.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/2021932154522887.pdfIn PDF document text
    • http://cn-daomeng.com/upload/userfiles/files/3eebc014fa70b29089c7303ab9cbe8b7.pdfIn PDF document text
    • https://saintarseny.ca/sites/saintarseny.ca/files/file/duvuvawaredijatu.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614359a00317f---piduvumofuxetijojitexarog.pdfIn PDF document text
    • http://umrllc.com/userfiles/files/pimanaloxeguvubisukopelo.pdfIn PDF document text
    • https://clubkdo.fr/img/pics/files/lofakib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=aplikacja+wifi+androidPDF link annotation
    • 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_off0000e1ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EC 18708 bytes
SHA-256: 9f2f785a1fe3c9b473b3dbb17c1067b8fded0038594201c29fbfc5209e6b1ad9
font_01_sfnt_off000111f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F1 10504 bytes
SHA-256: a249d17e893caf74420c430ddc9c7493dc0dea19c4b09344845916fe00bc033e