Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e6e6e46bc5180ce…

MALICIOUS

PDF

69.1 KB Created: 2021-09-26 00:33:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6118939daa4f62cb196e0b58ca94d19e SHA-1: 74e879164a8dad6f0266d549cdca6c45d8703eff SHA-256: 9e6e6e46bc5180ce8dab362e3a83f38852e28862cec5d11c3b2d1fbdb3dc08cd
176 Risk Score

Malware Insights

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

The PDF is identified as an image-only lure, typical for phishing or malware distribution. It contains numerous links pointing to external resources, many of which are hosted on compromised CMS uploads or disposable domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://acutecardio.ru/sadm_files/fewova.pdf
    • http://uni-farm.pl/ckfinder/userfiles/files/tugubinakajotinita.pdf
    • https://used-machinetools.ro/app/webroot/files/userfiles/files/detutobubume.pdf
    • http://etre-belle.su/images/file/35907286754.pdf
    • http://tns-china.cn/editor_upload_image/file/wopawubaduwigoparevadapa.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16148317bb05bf---xemesomapegizuno.pdf
    • https://diedacorporation.net/freesiafiles/file/lirixonukalolorodenubid.pdf
    • http://olivetheater.com/userData/board/file/45962260205.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139e736b49f2---segaji.pdf
    • http://dienhoabacninh.vn/webroot/img/files/lojipilidupirigaw.pdf
    • https://jesssmithtri.com/jesssmith/ckfinder/userfiles/files/11911146718.pdf
    • http://cmuniontravel.com/userfiles/files/walepuredurileb.pdf
    • http://venkateshservices.com/uploads/digivikukabajepokutev.pdf
    • https://sbmhavacilik.com/userfiles/file/8264018564.pdf
    • http://parikshitconstruction.com/uploads/36981108833.pdf
    • http://net-marketing.hu/images/files/sifowudafikoramelok.pdf
    • https://mallorcaboom.com/res/wysiwyg/file/80334844609.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/9253218a0bf0ede1bd5139220fd75b80/57339659954.pdf
    • http://icoenergia.com/userfiles/files/69038961712.pdf
    • http://greenglobepms.com/uploads/karujunomob.pdf
    • https://truckforceone.com/upload/editor/file/bigavipilunakasezasiri.pdf
    • http://ceramicaartisticamarsalese.it/userfiles/files/tolitezuvudulegavaruw.pdf
    • http://chemicalengineers.ie/images/juzogefoxizuxi.pdf
    • http://borisovhlebprom.by/var/upload/file/xirusoxadutenap.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=windows+10+pro+download+64+bit+with+crack+full+version
    • 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_off0000af62.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF62 16792 bytes
font_01_sfnt_off0000c774.bin
65d0eb7704f9b3bad7135094c6ba16f4a6499e704b1c0796be6d2b8603c0d1ce
pdf-font-stream PDF embedded font (sfnt) at offset 0xC774 14412 bytes
font_02_sfnt_off0000eb25.bin
ca405eb91e063543921eaa36f7c6ad0ca1b8a7f7b5e25601ffe5b9aceaedc674
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB25 11616 bytes