Malicious PDF — malware analysis report

Static analysis result for SHA-256 d030b2872cc33580…

MALICIOUS

PDF

88.5 KB Created: 2021-08-04 07:41:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 43e85420e0da54b338ce28051dd3e1dd SHA-1: f3c6f0592f4e0d86fb84af49f6f963118f54c123 SHA-256: d030b2872cc335800b08b152a336ac2dbab5cb4e0b534c7e486d18fd258ad380
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous external URIs and link farm patterns pointing to compromised WordPress uploads and disposable hosting, suggesting an intent to redirect users to malicious sites. The document body was unreadable, but the heuristic firings strongly indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://irlanc.ru/uplcv?utm_term=hack+pubg+mobile+no+root PDF link annotation
    • http://alnadaoil.com/userfiles/file/vitijoruvudadaxop.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a49d1288ebb---47458864026.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/a30f3808711981fbff93843d9c55fe86/tagano.pdfIn PDF document text
    • http://londonjip.com/userData/board/file/54830333296.pdfIn PDF document text
    • http://baikalspring.ru/ckfinder/userfiles/files/79317791206.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b70ea4245d6---nexosirijotuzixedu.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b8f4da3c24e---wovetuzun.pdfIn PDF document text
    • http://chukguwang.com/files/fckeditor/file/simaxasexuraribar.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/4ecd65e26e84e5e8ad3a6b9f2362ab3e/zinedawanafukala.pdfIn PDF document text
    • http://mankatomnclassof71.com/clients/e/e0/e0e8961458839910853a12af65841b27/File/93878296366.pdfIn PDF document text
    • https://nestsearch.in/admin/uploads/file/72954111912.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/77213716148.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/dc38499c2be085246745916e7d39266b/kikadalulimarowej.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/29298686375.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2be91becb---lisageteva.pdfIn PDF document text
    • http://yucehukuk.com/resimler/files/53423431622.pdfIn PDF document text
    • http://rhondachem.com/d/files/6544988270.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba66817964---jukuxawojazaxi.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/d257447775530f1d1c70026174329b72/13452069105.pdfIn PDF document text
    • http://designbeginnings.com/upload/file/38345807692.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/25985777633.pdfIn PDF document text
    • http://rebornfair.com/FileData/ckfinder/files/20210803_BB070E36A955D32E.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/1535859797.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_off0000f5bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BF 17380 bytes
SHA-256: 4651e73d243bc811a6d4e7cfe8608964f8c6889c00cfb904f191c65082ec0d1a
font_01_sfnt_off0001234f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1234F 10872 bytes
SHA-256: 527b7d5df196ef4b2e8a8f64d7b926da53081bc2217bcbfb95e94e777dd12749
font_02_sfnt_off00013c2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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