Malicious PDF — malware analysis report

Static analysis result for SHA-256 192948fc7f0c8b80…

MALICIOUS

PDF

88.5 KB Created: 2021-08-19 00:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 658b6f7d3593b49b67d0e8166c84b24f SHA-1: 9c5bb2854aa0a988945deda2c30bfb14e2066ae7 SHA-256: 192948fc7f0c8b801b952eeb2bc46aacb7e0bdde8043f50b9e70e973f63258bf
156 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 https://crysiq.ru/uplcv?utm_term=tuxedo+jacket+with+tails+sewing+pattern PDF link annotation
    • https://ecohort.biz/userfiles/files/84060135411.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/42deca7b818de28f322c3542ea79b485/jagiboleradog.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160927d7dc249d---20960436622.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/5b660f8b7e8e3e3aa45f792c109b510f/wafuwesoginibam.pdfIn PDF document text
    • http://davcpundri.com/css/file/6484185713.pdfIn PDF document text
    • https://alyosserspneed.com/userfiles/files/79159415790.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/e40fb0bf62702c1f9b208949faf2c3a0/zariruvutuvoneguv.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/manibisobir.pdfIn PDF document text
    • http://myesen.life/userfiles/file/pajitetimudozipamifibi.pdfIn PDF document text
    • http://jorkurojus.com/userfiles/file/sivawozakefobakutinivov.pdfIn PDF document text
    • http://somsit.com/ckfinder/userfiles/files/14528300222.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-5-10/20210510061718304019.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/e4703b071a3d776519c2a468f1e38154/bukeresejopoderigixefis.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/73216178951.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160905a3fb30ac---2139573525.pdfIn PDF document text
    • https://www.moxiclear.com.au/application/third_party/ckfinder/userfiles/files/59675583601.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/5t37rk5fq87el1s3k32vvh1cge/kisodi.pdfIn PDF document text
    • https://stcc-sa.com/motakamel/Ups/files/miturigoj.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/42974470882.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/morenizijufutugapu.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/12920535934.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/81308415434.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/161088129d004e---24981993475.pdfIn PDF document text
    • http://shahgrp.com/uploads/figupixetoremi.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_off0000f45c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45C 16940 bytes
SHA-256: c95e7bc9a3ebb5ed51ff8bc1b1fefd9de92acde772472e0c105a499676ee9114
font_01_sfnt_off00012039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12039 11268 bytes
SHA-256: 0fe8d85cc8abe9a9af04bec71000a7eceb6a327e856bec5f9ae64eb39fe3cadb
font_02_sfnt_off00013a77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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