Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6fc1e45d0329611…

MALICIOUS

PDF

79.3 KB Created: 2021-09-20 23:22:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e36145d686f16b143a6d0e03b3382238 SHA-1: 75aa0d10b9a2358a6c3170fea4c462b27716fa34 SHA-256: c6fc1e45d032961191f0886c7c33a205028d58459f60fa2af78acca15b109310
164 Risk Score

Malware Insights

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

The PDF document contains numerous links, many pointing to compromised or disposable hosting, suggesting a phishing or malware distribution attempt. The presence of a visual download button lure further supports this. ClamAV detection and ML classification confirm the malicious nature of the file, likely serving as a dropper for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pixomot.ru/uplcv?utm_term=tamil+movie+play+apk+download PDF link annotation
    • https://035620126.tw/upload/greenkitchen/files/bedinalib.pdfIn PDF document text
    • https://zenmobile.in/jaipriyart/uploads/files/xobadasukovaroza.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/9f2a74224f133f032cd575cebc7bf457/93851019963.pdfIn PDF document text
    • https://kuepancong.com/contents/files/gugefobunu.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/161355d699c6a9---29288443336.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/52974351504.pdfIn PDF document text
    • http://grafiport.com/userfiles/file/wotop.pdfIn PDF document text
    • http://letnipohar.cz/upload/file/23626571661.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613971681a785---59863057480.pdfIn PDF document text
    • http://colorsoftexas.com/ckfinder/userfiles/uploads/37928071751.pdfIn PDF document text
    • http://topoint.cc/userfiles/fckFile/20210920185134.pdfIn PDF document text
    • http://mywymc.com/userfiles/file/mijosolasoruzuxopijogasew.pdfIn PDF document text
    • http://d2dgroup.net/upload/files/vetexuwawusaxumageno.pdfIn PDF document text
    • https://basisangka.com/contents/files/69824803555.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/gemani.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fa97c861c9---sosefamobowutenujutikevox.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/xeridobokafavurug.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/161338e9421e5e---53108927971.pdfIn PDF document text
    • http://obrienbuilders.com/userfiles/file/97563027672.pdfIn PDF document text
    • https://staging-info.sharkovinkom.com/sharkovinkom.com/ckfinder/userfiles/files/94055060374.pdfIn PDF document text
    • http://sanfrancescovet.com/userfiles/files/kozodoresozawufidunome.pdfIn PDF document text
    • http://nationalherbo.com/userfiles/file/lifotedawexazetedi.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/qavkbfgv9do4balllbumtasvup/69095389371.pdfIn PDF document text
    • http://ordinate-ltd.com/file_media/file_image/file/75410379486.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_off0000d0ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0ED 10508 bytes
SHA-256: 43ee73785c1563b94e0ac180e3e79d920d7ae315902b1375a3f0985a14d26db9
font_01_sfnt_off0000e8d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000100e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E5 17960 bytes
SHA-256: 578515254ad874a8287a301722821417212978dbe20b1ffcd6ef57ac09361997