Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcd9108ff99a1f10…

MALICIOUS

PDF

85.4 KB Created: 2021-09-18 09:53:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 335af2b4158ef331f708c471b7b2e0f1 SHA-1: 9621728bac6c7d14cfe5ba8858124bffe5628558 SHA-256: fcd9108ff99a1f10a785e730de447493c7fea18e5ed857b27c3e846c870b64ea
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate high maliciousness. It contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress uploads or disposable hosting, suggesting a phishing or malware distribution scheme. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=game+grand+action+simulator PDF link annotation
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161426e061c741---2808360176.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/161450f29b0de4---87101445855.pdfIn PDF document text
    • http://tasfor.com/files/galeria/files/42206686394.pdfIn PDF document text
    • http://anchor-m.com/js/upload/files/51568623440.pdfIn PDF document text
    • http://runo34.ru/attachments/file/palube.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/41642581933.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16132ba85ad3b8---52658502512.pdfIn PDF document text
    • https://congnghieptauthuyvietnam.vn/upload/files/73648035122.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/74359602540.pdfIn PDF document text
    • http://bisenzia.it/userfiles/files/72926589911.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd316b4ebb---41548322744.pdfIn PDF document text
    • http://botaierpharm.com/upload/files/25007245098.pdfIn PDF document text
    • http://alothongtin.com/upload/FCK/file/zuzijozepumureraxif.pdfIn PDF document text
    • https://sentinels.ro/userfiles/file/visipodibadoz.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/40148758792.pdfIn PDF document text
    • http://angel-conference.org/upload_fck/file/2021-9-18/20210918104818251508.pdfIn PDF document text
    • http://numismatika-nbkpdy.cz/userfiles/file/47913137854.pdfIn PDF document text
    • http://avsa.org/sites/default/files/images/files/wukifurujozapowovuwazemus.pdfIn PDF document text
    • http://eqletstalk.com/uploads/files/202109102253273434.pdfIn PDF document text
    • http://simsvizag.com/admin/uploadedfiles/file///76553968299.pdfIn PDF document text
    • http://hwayoung.kr/upfile/files/37348650512.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/bopugosok.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612f9ae3b18d1---barigaxifisuxixuvexivazix.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_off0000eaf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF9 10852 bytes
SHA-256: aa27f077dec8e224249b864dcc8e4417fcf66b79faaf3a8d22dc63276a94c7e8
font_01_sfnt_off000103d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE4 16904 bytes
SHA-256: b451e143677c7497865f36020078a965133e863b2f062654837d6d565118afab

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