Malicious PDF — malware analysis report

Static analysis result for SHA-256 b96128b73219d86e…

MALICIOUS

PDF

86.7 KB Created: 2021-07-13 21:59:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9621ad96dc4d57a5a2b5349663ad647a SHA-1: 4e79dfc68b12f8fdfa920282f22acff0740107bf SHA-256: b96128b73219d86edf3a84d9f615dbc6535df33149b3f4fb0a875b1f8bc65abe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16097395aa73de---mopizegunuruwegebavojupo.pdf In PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/sogizemipexe.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607275f09ab60---ponososa.pdfIn PDF document text
    • http://sh-ruiyangcpa.com/userfiles/file/2021-7///20217784884349.pdfIn PDF document text
    • http://memphiscentral1969.com/clients/865565/File/tatefonobepej.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/69160653554.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/92988574080.pdfIn PDF document text
    • https://phuketwebstudio.com/ckfinder/userfiles/files/73411025394.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/juruxufozasiju.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/282d854c4c322e5e94ef55e931019787/pesubewopopivojufu.pdfIn PDF document text
    • https://parkettworld.com/upload/files/gusikuwakigati.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/f9s2doneeldb9u6irco4jdi3l6/61016547950.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/bexotofumazijadujufivare.pdfIn PDF document text
    • http://omg.su/upload/File/31873513005.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/kifinegutusil.pdfIn PDF document text
    • http://yorktownhs1987.com/clients/57482/File/57159123441.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dbb9564f677bf979ed04d7b86e61a1b5/1374307966.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160a989eb206cc---bupopadutesotijofaba.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/64b88539e66bbb92b22b8f48cda4c692/58019230216.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607de368ac47a---74469260702.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/kuzovifogexibe.pdfIn PDF document text
    • https://corpusbg.com/files/fck/file/bunowukuzatozepatev.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/83cefa02fb50809cdd845320eb4006fb/78509360506.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/e6ec209b862c6c31006d3f8355337668/romodik.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871f09944ef---puzuzofoni.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/97005180240.pdfIn PDF document text
    • http://ttc-investco.com/img/files/78786230022.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/o73poch2et6dgsmm3g0adseh6n/51716086642.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=anatomy+and+drawing+by+victor+perard+pdfPDF 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_off0000ee31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE31 11136 bytes
SHA-256: 6e12613501436c9c01bda4d9ef1a85f79f7e8be7f5765d6272e3112487e1fd57
font_01_sfnt_off000107e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E3 17168 bytes
SHA-256: 959a553af806dad46c8311d8898e172e575433b7e95b994ba329236fb5adf8e1
font_02_sfnt_off000134fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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