Malicious PDF — malware analysis report

Static analysis result for SHA-256 990cf440b84fd835…

MALICIOUS

PDF

77.3 KB Created: 2021-09-19 21:30:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 45ed27e469b30e89d69e329ea78c994c SHA-1: 5e574672876a5cf467d42795e12e1b4a8a5bccf0 SHA-256: 990cf440b84fd8355505951ae531ec1c0bb4ed2ba5449d2972fdc208efe6e186
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous embedded URLs, many hosted on compromised WordPress sites or disposable domains, suggest a link farm designed to redirect users to malicious content, likely for phishing or malware distribution. The presence of 'utm_term=car parking simulator money hack' in one URL hints at a potential lure for game-related scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd975af356---28912515505.pdf In PDF document text
    • http://nathulaldasptti.com/ckeditor/ckfinder/userfiles/files/famudopotulorojazidogo.pdfIn PDF document text
    • http://jiehuist.com/userfiles/files/37087357575.pdfIn PDF document text
    • http://travelbilet.ru/sites/default/files/file/87440332286.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/mikazivupuxarojewi.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16144835464283---59675748596.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021090505152673499.pdfIn PDF document text
    • https://gencerenerji.com/resimler/files/77657292772.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/161320baeaee7b---53553186915.pdfIn PDF document text
    • http://ddaengshop.com/ckupload/files/35797831310.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/vbcb33vf1d0aulcj2cjlmaes30/mevip.pdfIn PDF document text
    • http://denkobarbell.com/_upload/files/jererodupakakotazufu.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210909150101.pdfIn PDF document text
    • http://lonerangerfanclub.com/ckfinder/userfiles/files/63065933396.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/derogaberosi.pdfIn PDF document text
    • http://myucpb.com/userfiles/file/pafevapujepulekoxasoxal.pdfIn PDF document text
    • https://censcakmu.org/board/file/files/6560240352.pdfIn PDF document text
    • http://tomgiongvip.com/uploads/files/file/68711497709.pdfIn PDF document text
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/koxaxozi.pdfIn PDF document text
    • http://santeh.md/img/files/butogomunujosukezigepo.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613a04ebc0bc9---lusavovo.pdfIn PDF document text
    • https://ceccargiurgiu.ro/userfiles/file/pegeda.pdfIn PDF document text
    • http://kool-house.com/upload/editor/file/zujumetag.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/73719277647.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=car+parking+simulator+money+hackPDF link annotation
    • 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_off0000c83d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC83D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04F 17608 bytes
SHA-256: b1e2deaa0281eee86ce5c232a8feae50ab8892d834ad992b67bf241f51c2b17d
font_02_sfnt_off00010dc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC5 11160 bytes
SHA-256: d5e80de05fd3685c913b85db2e5c7ed1c9287936cde6d2e4eae13e86946286cd

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