Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc7b52b1f2f304f1…

MALICIOUS

PDF

69.7 KB Created: 2021-09-16 19:19:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 27d6e2d15e0be4e0ad1d0ad2c7562cc5 SHA-1: 400dda7e0bd17aa29320d5f246fe0e4a0f60ec43 SHA-256: bc7b52b1f2f304f1d06445b735960254c75e4260bf545b417b5c52f547c3691f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

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
  • 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://laborke.ru/uplcv?utm_term=i+cant+update+my+apps+on+play+store PDF link annotation
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/bdd46b973f636b020bb9bf69bcc832c7/18829654210.pdfIn PDF document text
    • http://bellamy.tw/uploads/files/202109151237456862.pdfIn PDF document text
    • http://xinxinhouseware.com/uploadfile/files/zajevikun.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/nofaridutosenulifunowukin.pdfIn PDF document text
    • https://duragloss.pl/userfiles/file/83784111637.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a73325aa55---dizenamedufitisuxo.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/xosajamawodim.pdfIn PDF document text
    • http://mezon.jp/userfiles/file/4394571948.pdfIn PDF document text
    • http://fteq.ru/files/file/89841245265.pdfIn PDF document text
    • http://galerie45.com/userfiles/file/27302746614.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/remorikorikokilisad.pdfIn PDF document text
    • http://texmet.pl/userimages/file/41610626980.pdfIn PDF document text
    • https://pastravariaizvoarelebratiei.ro/images/file/89405037923.pdfIn PDF document text
    • https://apaman.ti-am.jp/js/ckfinder/userfiles/files/51466813701.pdfIn PDF document text
    • https://maggievanostrand.com/uploads/media/file/venawopana.pdfIn PDF document text
    • http://lawngo.net/fckfiles/25546751556.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/vb0l4rgc1do4cu7d45dk0tace3/vomafik.pdfIn PDF document text
    • http://kimura-shihoshoshi.com/userfiles/file/xowuwexewises.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/85531526413.pdfIn PDF document text
    • http://napiarsaigh.com/images/jewezilunilow.pdfIn PDF document text
    • https://sandp-engineering.com/ckfinder/userfiles/files/10290636355.pdfIn PDF document text
    • http://gaziogluenerji.com/images_upload/files/woxuretoxawaxelomilobus.pdfIn PDF document text
    • https://batdongsandothanh.vn/luutru/files/27928807916.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/fuzapamadawukuwawitabisap.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_off0000b324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB324 14724 bytes
SHA-256: fce02c175d19fbd64a36cc7d01bafa94ada0ca7d3e14f2cbe752254191311eb3
font_01_sfnt_off0000d859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD859 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF070 10748 bytes
SHA-256: 4386b8288ad532ebf6cc6b1eab9bf3d514d61e26f042d9f0ca7c3541f6efceda

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