Malicious PDF — malware analysis report

Static analysis result for SHA-256 e914991e59ac184a…

MALICIOUS

PDF

84.9 KB Created: 2021-09-07 04:30:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 43bd9a51ed9a7563dc5b382a6c0f8a37 SHA-1: 49d5b3bb2583c90eae5659908490ca0b87133820 SHA-256: e914991e59ac184a457678a741c2b77353bf67231ed0343d3905690460590d52
196 Risk Score

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a social engineering attack (ClickFix). The document likely contains embedded links designed to lure the user into downloading further malicious content. While no scripts were directly extracted, the PDF structure and associated heuristics suggest an attempt to exploit user interaction to initiate a download or execution chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160875ba85427f---rabefivedalo.pdf In PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/166de55cb32d441866eab309ed1e53e2/zikijo.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/noputofi.pdfIn PDF document text
    • http://dochoiotovn.com/uploads/userfiles/file/redobunamexafagevaxade.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/59856070252.pdfIn PDF document text
    • http://globalquestconsulting.com/userfiles/files/xikupijopanazifivelu.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16199342622558.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102d44926896---88076850981.pdfIn PDF document text
    • https://pearproperties.in/userfiles/file/vilitovumivofozota.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/safavuxoputafujo.pdfIn PDF document text
    • http://korean-school.hu/hangul/userfiles/file/xagatadawuwuvuxexubozig.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/13hi25ce7qoepdv7rsb0flk8e5/veweli.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1610bfdf989667---2512169882.pdfIn PDF document text
    • http://vekosgroup.ru/userfiles/file/sojenaxemozaro.pdfIn PDF document text
    • https://riolospettacoli.it/filesUploads/file/29624832049.pdfIn PDF document text
    • http://prosefkuchare.cz/userfiles/98325772588.pdfIn PDF document text
    • https://melnikhouse.com/userfiles/file/7191350662.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/manop.pdfIn PDF document text
    • http://innovatepc.com/userfiles/file/tebujoxodolekavekij.pdfIn PDF document text
    • http://envigest.cz/upload/file/82941582115.pdfIn PDF document text
    • http://trivio.it/userfiles/files/sozetitafegabibatipe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=shrink+pdf+size+windows+10PDF 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_off0000e41c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2E 19212 bytes
SHA-256: 08bfc743dfd020121af31b313457849ebe3b38b49deb1ba65a0c2aa26bc5bb6c
font_02_sfnt_off00012cfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CFD 10776 bytes
SHA-256: 3c28faa40b31922c83cf6eb3a7b5c1c83f942077376d39d8d961d79f994a4d64

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