Malicious PDF — malware analysis report

Static analysis result for SHA-256 daa418fc33ca7969…

MALICIOUS

PDF

99.1 KB Created: 2021-09-20 07:21:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3d8ea5fc30a95fe7b9ddc197408b217c SHA-1: 64d0455ce9f05726236096224e49349e20a50c30 SHA-256: daa418fc33ca7969044672f659b69befb2fdaabe928f6cefb479df73ae42e7e8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1553.005 Security Software Blocking

This PDF document was flagged by ClamAV as a phishing trojan. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm or phishing lure. Crucially, the document contains an explicit instruction to disable security software, a high-risk behavior indicative of an attempt to bypass defenses for further malicious activity. No scripts were extracted, but the overall pattern suggests a malicious document designed to deceive users and potentially download additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614282b764986---ladimuparufagimupuzibu.pdf In PDF document text
    • http://carrozzeriardue.it/userfiles/files/64394692973.pdfIn PDF document text
    • http://antracit.topmebli.com/content/xuploadimages/file/govonawelerazufazifozu.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/wedekokowikes.pdfIn PDF document text
    • https://designmaster.in/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/45875777268.pdfIn PDF document text
    • http://neboskreb-irk.ru/uploads/userfiles/files/9011066727.pdfIn PDF document text
    • https://immo-macedo.lu/userfiles/files/kakaxatiguwobopek.pdfIn PDF document text
    • http://max-metal.pl/gfx/file/29361374732.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/161473576cc611---56064461586.pdfIn PDF document text
    • http://www.syrahresources.com.au/application/third_party/ckfinder/userfiles/files/kidojuzuwedilufirakokop.pdfIn PDF document text
    • http://www.petersonassoc.com/emailimages/file/94530143277.pdfIn PDF document text
    • https://ra7a7p-h3ba7.com/contents/files/44248523605.pdfIn PDF document text
    • http://popmetre.com/news/files/sukupapegi.pdfIn PDF document text
    • https://albertoangel.sinecsas.com/ckfinder/userfiles/files/gowususi.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16133342bed50c---zimigevebufipulafovekibe.pdfIn PDF document text
    • http://lafenicealcamo.it/userfiles/files/82233061880.pdfIn PDF document text
    • http://riverside-plaza.com/upload/userfile/files/tuzuvogopovigeno.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161478d759eec6---91586193318.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210910_97A894820BA4C20C.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/pifenuwaxereneradomeze.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/dubegutejotawe.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/zosukoseluwe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=swapper+root+apkPDF 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_off00011e0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E0C 19128 bytes
SHA-256: fe06a717b9304364e6ceb52827fd2e369d47d72919d96de2dc9abfabdfc91689
font_01_sfnt_off00015080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15080 10088 bytes
SHA-256: 69569eb72dde01188369ecf68c24282babd165b867c0fcc461c8bc40a9d6daa4
font_02_sfnt_off0001673a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1673A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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