Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c46e476e414ec64…

MALICIOUS

PDF

74.4 KB Created: 2021-09-15 20:17:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: cf2521a1bf5c758da73df122c50b185b SHA-1: 9046d3021a6efcd588fb9c11c5e32ec708d20d58 SHA-256: 0c46e476e414ec643b450a0c76e46cda493a2c64f15f8c440dd0c8b07eb50ae2
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript, a common technique for executing malicious code. Additionally, it features a large number of external URLs, many of which are hosted on disposable domains, indicating a likely attempt to lure users to malicious sites. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • 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
  • 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://pk-rowery.pl/user_pict/file/33896979.pdf In PDF document text
    • https://actsonics.com/uploads/files/202109062019107354.pdfIn PDF document text
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/25641635249.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/xodenogedilifa.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/96995338904.pdfIn PDF document text
    • http://vinhomeshaiphong.net/app/webroot/img/files/785197384.pdfIn PDF document text
    • https://ladangmimpi2.com/contents/files/xosezefivep.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/0055866082.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/b3254996ffab66dc8249304293ba6a62/turalamumuxa.pdfIn PDF document text
    • https://nitm.ac.in/nitmeghalaya/ckfinder/userfiles/files/86680261020.pdfIn PDF document text
    • https://cemb.ca/upload/editor/file/fesajinewulazaju.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142196c06f86---47315203864.pdfIn PDF document text
    • http://itemclinicchina.com/ckupload/files/37485561349.pdfIn PDF document text
    • http://as-eng.biz/userfiles/file/93867723637.pdfIn PDF document text
    • http://www.puhito.hu/uploads/65593802587.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/gawejilitoluli.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/leleterelelojenesamepor.pdfIn PDF document text
    • http://watdoenwevandaag.nl/upload/7768354842.pdfIn PDF document text
    • http://keystoparadise.com/userfiles/files/nitapudetiterigepafow.pdfIn PDF document text
    • https://u-spot.biz/js/ckfinder/userfiles/files/bubagoril.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/kilamuvelitan.pdfIn PDF document text
    • http://yomamasushitogo.com/uploads/files/sixujigevapuboxi.pdfIn PDF document text
    • https://yk-tech.com.tw/ckfinder/uploads/ckfiles/files/sajufonuwimevakefi.pdfIn PDF document text
    • http://kfoodntea.com/dataroom/file/penenibuguvifezewof.pdfIn PDF document text
    • http://cross-winds.in/upload/contents/images/images/61585429477.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=world+cricket+championship+1+mod+apkPDF 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_off0000c0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d8ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EE 10916 bytes
SHA-256: 9a305411c6c9a86461d8e2547370020e6aa0ea87aca9a69cabf12b60b1ff6302
font_02_sfnt_off0000f20e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20E 16248 bytes
SHA-256: e28fa974e6def9b7b764a9ccef4e3e931f75d43782d4565692585a4770b45cb1