Malicious PDF — malware analysis report

Static analysis result for SHA-256 20925560f4dd0891…

MALICIOUS

PDF

77.9 KB Created: 2021-09-07 04:57:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 24c11ce172c53844346f9cdf0cf4723c SHA-1: 8dec287f4eeb143f376a127b92c61fdf54045bc0 SHA-256: 20925560f4dd0891451d757e1669d918cb56d6d9333c232385c178f0f2534126
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL analysis strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 6

  • 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.
  • 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://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be77216a8a---36401748033.pdf
    • http://djarkitek.com/temp/vinney/HTML/userfiles/file/bapizimigatewajam.pdf
    • http://dalaichau.com/files/11522644186.pdf
    • http://baaningdoi.com/file_media/file_image/file/3562875921.pdf
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a6fc5ff20e0---4622965559.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/kgiiupra4kal25qrq4eec7n6ut/46000824841.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607af43e04d51---96781346653.pdf
    • https://businesslife.com/content/file/tabesutikamuw.pdf
    • https://jakspravnenapsa.cz/userfiles/file/7703297013.pdf
    • http://ergo-logo-bamberg.de/userfiles/file/96977213778.pdf
    • http://yenidenyuzlendirme.com/ckfinder/userfiles/files/pipikisaviw.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f95c313cf6a---99454350072.pdf
    • http://shrlie.com/upload_fck/file/2021-8-16/20210816102358250008.pdf
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/e503405b3b5f1dab0c5ca4014f25aada/31859263757.pdf
    • http://fmi.lu/userfiles/files/69058941466.pdf
    • https://purefeeling8.com/data/file/bivebavinebi.pdf
    • https://ceccarbotosani.ro/userfiles/file/ninojetinuw.pdf
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/goq8g6nfj441mv8986rvhfka67/4341769855.pdf
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/d8c64his36j51admq5jlng51gl/kijefilolikujigusizon.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102dfcad1e41---pilemaxebiwazawugo.pdf
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/1b0a44498934f0f7b3c48cd13bfad989/mivasonenivelepoxe.pdf
    • https://whatproperty.ng/ckfinder/userfiles/files/lasow.pdf
    • http://sunnysolutions.it/uploads/assets/file/5593669390.pdf
    • https://hiroyoung.com/data/files/ruwunidamobegekepowinu.pdf
    • http://mapect.com/upload/fckeditor/file/gipovanobaguserafuxurola.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=la+empresa+y+tipos+de+empresa+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cacc.bin
f08e580c677acce43ca09a27d6f6e817818e962a25a8a4a3c9507fb7f432533c
pdf-font-stream PDF embedded font (sfnt) at offset 0xCACC 17932 bytes
font_01_sfnt_off0000f81d.bin
8574332c936ae10187a859d0bea8bcde45a8ad6c035121fb0f3e2ea84d4422cb
pdf-font-stream PDF embedded font (sfnt) at offset 0xF81D 10580 bytes
font_02_sfnt_off0001104e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1104E 16792 bytes