Malicious PDF — malware analysis report

Static analysis result for SHA-256 25eb331d74c1fd06…

MALICIOUS

PDF

81.3 KB Created: 2021-09-20 11:15:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 584d02dc433cb581bb737c5d760771ef SHA-1: 0b6478e4b73d0a05c4f2bba899e2681843c3de4b SHA-256: 25eb331d74c1fd0694a2515654d65daab5fd73111dca3330cd30a8ecdf80538e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing operation. The presence of a URL with 'download apk dragon city mod unlimited gems' indicates a lure for potentially unwanted or malicious software. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 https://oniceh.ru/uplcv?utm_term=download+apk+dragon+city+mod+unlimited+gems PDF link annotation
    • http://sciattella.net/images/file/xavat.pdfIn PDF document text
    • http://tahyuh.com/uploads/files/202109090503064073.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/0346ee5ec06c2af512119d03e98b3b8e/porelazavebif.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/89628079172.pdfIn PDF document text
    • http://zuche0551.com/upload/file/belazid.pdfIn PDF document text
    • http://morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146e56acebbe---delemowi.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/c36dee42d61da52245460125a60a429b/danodopatam.pdfIn PDF document text
    • http://quangcongluc.com/upload/files/7041775362.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133cff9cab30---89013940099.pdfIn PDF document text
    • https://nangluongvada.com/uploads/files/89361594622.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/59610194598.pdfIn PDF document text
    • http://ghefoot.com/fckeditor_userfiles/file/20308727701.pdfIn PDF document text
    • https://pingthye.com/userfiles/files/wonoziwepuge.pdfIn PDF document text
    • https://armenia4d.com/contents/files/mukagus.pdfIn PDF document text
    • http://quatanggiabao.com/images/uploads/files/45043713411.pdfIn PDF document text
    • https://strings97.hu/userfiles/file/nekugejefawak.pdfIn PDF document text
    • http://patroha.hu/file/12894175666.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/48559949493.pdfIn PDF document text
    • https://www.rougeindigo.com/ckfinder/userfiles/files/ziwiwedemozifenajita.pdfIn PDF document text
    • http://detskypohar.cz/upload/file/zegisiziluxuk.pdfIn PDF document text
    • http://woodbridgeabw.com/uploads/files/4804783017.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16136da8d5bfae---mikuramar.pdfIn PDF document text
    • http://phamtrangia.com/upload/files/sarijomuberowijij.pdfIn PDF document text
    • http://banlinhkienlaptop.com/userfiles/file/73624080556.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/wezilevivabetofaferupa.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_off0000d5df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5DF 11248 bytes
SHA-256: b7bf2bb129e3b36c554ca836d9bbc7793dd1c3b87f907c86b6530a872b957b48
font_01_sfnt_off0000f01e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01E 18252 bytes
SHA-256: ec27b989a6f0240c7d1420fad4808bd0ab65f178f3395b781ed4e3e25ded5992
font_02_sfnt_off00011f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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