Malicious PDF — malware analysis report

Static analysis result for SHA-256 97c6b8046785a712…

MALICIOUS

PDF

69.5 KB Created: 2021-09-28 12:09:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 379a2841e92a0ab21acbcab084e220ce SHA-1: a1d90770533a3ae082555f6ddf86dab2b7fad1fc SHA-256: 97c6b8046785a712d36fbcddcf64205fdb93ac1077d7516ae03fe0067b751e5f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, indicating a phishing or malicious content distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via the embedded JavaScript and link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • 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://allytemp.ru/uplcv?utm_term=pro+snooker+mod+apk PDF link annotation
    • https://erdemlerkoleji.com/resimler/files/24168528403.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16149948556770---73544637540.pdfIn PDF document text
    • http://simpelms.nl/userfiles/files/nonikawobugajole.pdfIn PDF document text
    • http://hzxgdz.com/images/upload/File/18750237000.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/1fd82ba042881af160a83048baae71bb/86664078063.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/c7b2e55cdd4c1c05571f670edcf53b09/gakezazegobumenuf.pdfIn PDF document text
    • https://bravo-hk.com/userfiles/file/ragefowarus.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bccb51332a---61397287710.pdfIn PDF document text
    • http://edmunditemissions.aboutgiving.net/sites/default/files/editor/file/xosazituv.pdfIn PDF document text
    • http://sherwoodonionfestival.com/ckfinder/userfiles/files/91889678240.pdfIn PDF document text
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/putexujasob.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac927800c0---zodawuj.pdfIn PDF document text
    • https://506hlapeta.com/files/file/73236542013.pdfIn PDF document text
    • http://belstroyiz.ru/img/file/32374417758.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/11345836196.pdfIn PDF document text
    • https://fptica.ru/images/file/radoverepetison.pdfIn PDF document text
    • http://idolyokocho.com/js/ckfinder/userfiles/files/batufugajuxa.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/94860397697.pdfIn PDF document text
    • https://www.netcorp.hu/data/editorfile/32010423656.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6df77f807---dosetawubunujovemi.pdfIn PDF document text
    • http://autowassenindex.nl/images/uploads/25046926774.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/91438300904.pdfIn PDF document text
    • https://fuze-pay.com/ckfinder/userfiles/files/75091574835.pdfIn PDF document text
    • http://perfecturology.cafe24.com/upload/editor/imagefile/2699595266.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_off0000b2a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cabb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCABB 10408 bytes
SHA-256: 85625a174ed0a08bd30a2c640ace19a9c7cf07ae36ec6a435a450fc39324249d
font_02_sfnt_off0000e24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24C 14976 bytes
SHA-256: dd837fd1b11c1054fba8440812fd05a4a924f154ba4cd2dfc55effd74283daf4