Malicious PDF — malware analysis report

Static analysis result for SHA-256 2917a2c73f6ff32b…

MALICIOUS

PDF

82.5 KB Created: 2021-09-19 13:08:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: fcf21d8a5d4862781dc56d6c4b2a459e SHA-1: 3583f8ef2324fa329a98bf38380268d90b3be131 SHA-256: 2917a2c73f6ff32bf2bc153391282acdabe6fbf8a35e8cc973dd20d3e24844d1
164 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to distribute malicious files. The presence of a 'download button' heuristic further supports the lure-based attack pattern. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • 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.
  • 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=ram+jaane+full+movie+download+mp4+hd PDF link annotation
    • http://hodori247.com/uploads/files/panawin.pdfIn PDF document text
    • http://sp2wronki.pl/fotki/fotki/file/25877450836.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161417bc33de00---66780433506.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f070a0af46---80201442402.pdfIn PDF document text
    • http://vibrobreaker.com/files/files/botakubuzidu.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/sb0pvpa95bfrmq27p3coq79ct7/jamonome.pdfIn PDF document text
    • http://saiprogetti.net/userfiles/files/77265416571.pdfIn PDF document text
    • http://www.chp.pl/ckfinder/userfiles/files/gesenaf.pdfIn PDF document text
    • https://harteron.ee/userfiles/file/95215461569.pdfIn PDF document text
    • http://bennett-legal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mowilowizezivedinu.pdfIn PDF document text
    • http://swhos.com/upload/files/dajirisomimutepexudufenu.pdfIn PDF document text
    • http://videocycling.info/files/file/tagexoxosug.pdfIn PDF document text
    • https://srmhomes.com/images/bulk_images/files/80508290825.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16143f37c625f3---buxijixupisa.pdfIn PDF document text
    • https://soswzgierz.pl/web/uploads/files/jelelixiwone.pdfIn PDF document text
    • https://digitaluzaktanegitim.com/calisma2/files/uploads/90347203255.pdfIn PDF document text
    • http://n3ss.ro/ckfinder/userfiles/files/lozom.pdfIn PDF document text
    • http://sake-tori.com/images/library/File/64229240152.pdfIn PDF document text
    • https://pensiuneaselina.ro/userfiles/file/84865456287.pdfIn PDF document text
    • https://nikoljski.com/ckfinder/userfiles/files/katanuzobujopowobe.pdfIn PDF document text
    • http://xn--90aoa5aj.xn--p1ai/ckfinder/userfiles/files/53636013697.pdfIn PDF document text
    • http://ngoinvest.com/uploads/ckfinder/files/50817219262.pdfIn PDF document text
    • http://nut-shell.net/upload/files/dafazanelogasupufisiz.pdfIn PDF document text
    • http://thangmayedex.com/webroot/img/files/sirogikurujifox.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_off0000d922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD922 19272 bytes
SHA-256: e695d22a2e4e868d1655dbe3bbf9695639b6d4f61951de0a7643ec4d6b126973
font_01_sfnt_off00010b74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001238b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1238B 10900 bytes
SHA-256: 7ad4d59492fd6311b32ccdd229b376e63d094cb9230dc367f96327884d86710a

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