Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc17a855b203723b…

MALICIOUS

PDF

71.2 KB Created: 2021-09-24 13:17:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e6c1b4c86bdb217a7e0c7d3e14c7368b SHA-1: 7e250ba054b47280031457304da579a9ac353fed SHA-256: bc17a855b203723b185873933680e35287446cb5001d3ddf427eac39f26d6198
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also features numerous external links, including one pointing to compromised WordPress upload storage, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature.

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 http://demenagements-remond.fr/userfiles/file/20210913001056.pdf In PDF document text
    • http://oticonshop.com/ckfinder/userfiles/files/bepumesapefat.pdfIn PDF document text
    • http://infinijewelry.com/userfiles/file/33171860787.pdfIn PDF document text
    • http://nessium.net/userfiles/file/91187525920.pdfIn PDF document text
    • https://ilexgold.com/app/webroot/files/userfiles/files/kalakijanadimodidigo.pdfIn PDF document text
    • http://simoncaulkin.com/images/foditujewapuseveromew.pdfIn PDF document text
    • http://wordtmann.beckbauer.eu/ckfinder/userfiles/files/4168920044.pdfIn PDF document text
    • http://xn--80aantfcaehjbxzf1m.xn--p1ai/userfiles/file/53717386546.pdfIn PDF document text
    • https://prestinieurope.com/userfiles/files/weruwofugo.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614239b4ea7d4---zisovuwuwibo.pdfIn PDF document text
    • http://dajuicebarus.com/uploads/files/23172916136.pdfIn PDF document text
    • http://ebiocell.com/uploadfile/file///2021092413350965.pdfIn PDF document text
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/88274140446.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/161355ae241c53---84195225380.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/gexixapodinijulojuj.pdfIn PDF document text
    • http://lawfirm.vn/MINH/user_files/file/soxevobanizi.pdfIn PDF document text
    • http://stelmart.ru/userfiles/file/54942780080.pdfIn PDF document text
    • http://ventss.ru/userfiles/files/fanexuzusidid.pdfIn PDF document text
    • https://aukshanya.promosing.com/alpha/ckfinder/userfiles/files/zeburivo.pdfIn PDF document text
    • http://zhfangyuan.com/uploadfiles/files/navotagunapa.pdfIn PDF document text
    • https://ataru.site/js/ckfinder/userfiles/files/45624815065.pdfIn PDF document text
    • http://movediary.com/userfiles/file/46025762603.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/xubagakogasutowabojet.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1614b7ce21d7d3---sugasadigijojokelup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=led+wifi+price+in+pakistanPDF 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_off0000b469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB469 16512 bytes
SHA-256: 576309b2db302b7dc2c2f9e7a0da2a58760e7ec54e598460a1f0044ad7fc6d38
font_01_sfnt_off0000ded3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED3 10584 bytes
SHA-256: 2bb74e6f305e444df940656f0bbefc7b8fce45b7a28be9b9a806895dd3f5060b
font_02_sfnt_off0000f731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF731 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.