Malicious PDF — malware analysis report

Static analysis result for SHA-256 e639a5f1b9a153bb…

MALICIOUS

PDF

78.9 KB Created: 2021-09-26 18:24:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a57f953d0bb4c034a2074fdfb20d01e0 SHA-1: 89cf82524e97230914a35348fb67b2e0392367e6 SHA-256: e639a5f1b9a153bbeb371e3b9a6fa9d54485874b46eb4f23279be49c732c21cf
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are associated with link farms on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely responsible for redirecting users to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 6

  • 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.
  • 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 https://crysiq.ru/uplcv?utm_term=chal+mera+putt+full+movie+download+720p PDF link annotation
    • https://minhvuongthuphap.com/upload/ck/files/gopegazegidiji.pdfIn PDF document text
    • http://artio.pl/files/files/20861535577.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161341478915dc---12551808711.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/72781581449.pdfIn PDF document text
    • https://mwasafat.com/uploads/files/ravovudelofinomagi.pdfIn PDF document text
    • https://alcoolassistance-creuse.net/www/site/js/ckfinder/userfiles/files/32455234320.pdfIn PDF document text
    • http://teleinwestor.com/userfiles/file/juwiputexudebegumu.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/soridatumo.pdfIn PDF document text
    • http://decaldankinh.net/upload/files/25363403865.pdfIn PDF document text
    • http://demenagements-remond.fr/userfiles/file/20210911235247.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/4938392171.pdfIn PDF document text
    • http://czyxchem.com/upload/files/91346641076.pdfIn PDF document text
    • https://tdfstore.it/file/36673554966.pdfIn PDF document text
    • http://administratieindex.nl/images/uploads/54937575677.pdfIn PDF document text
    • http://nirmalamathachurch.org/cms_uploads/image/file/43305403028.pdfIn PDF document text
    • http://honeystraw.com/uploadfiles/file/lukerojuzunikogebevaji.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/zutasax.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/32603500273.pdfIn PDF document text
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/zalavaxaw.pdfIn PDF document text
    • https://cissud.it/uploads/ck_editor/files/kidutibalitavadewiwi.pdfIn PDF document text
    • https://soccerauquebec.com/userfiles/file/sasaravobegozuril.pdfIn PDF document text
    • http://redeyeldn.com/userfiles/file/96195435231.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/53202163656.pdfIn PDF document text
    • http://kdsonline.org/userfiles/file/67608556367.pdfIn PDF document text
    • http://volker-issmer.de/userfiles/file/54816528048.pdfIn PDF document text
    • http://cathugo-catamarans.de/res/wysiwyg/file/34757238374.pdfIn PDF document text
    • http://encino.ilovepokebar.com/uploads/files/91494490017.pdfIn PDF document text
    • 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_off0000c64f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC64F 20208 bytes
SHA-256: 62cdd1da06a418ca4338c2184b58b93978ce7df37d04a9c999b3b99edb21b942
font_01_sfnt_off0000fb28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001133f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133F 11172 bytes
SHA-256: b5c65a0dc01183aacac5202291d7b56844a2f76fedbfb101b433be1119680bbd