Malicious PDF — malware analysis report

Static analysis result for SHA-256 2afa7725b20fcecd…

MALICIOUS

PDF

74.8 KB Created: 2021-09-17 17:54:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e75528f053234fb4c6b19ca536c0be6c SHA-1: f1be6d056f0a2675043ca942f1433b3389b3dbb6 SHA-256: 2afa7725b20fcecd805379ec8853c71d157090a60edb2b69337bc25a86973c86
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The document's structure and the nature of the URLs point towards an attempt to lure users to malicious sites, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

Heuristics 6

  • 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.
  • 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://kovacsoltvaskerites.hu/images/file/pepivanes.pdf In PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139e308ae11b---jagipufonoxaziguxifa.pdfIn PDF document text
    • http://ukwoodrecycling.com/userfiles/files/zalajaxo.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/vumeke.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/38658646487.pdfIn PDF document text
    • http://france-ex.com/images/blog/file/10708677040.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/8a088f8a484847592564dcd139e73959/46143252834.pdfIn PDF document text
    • http://xn--80aesyq.xn--p1acf/files/file/28042211571.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161370195efc59---wowidijoliwobizosebat.pdfIn PDF document text
    • https://mariapolis.net/ckfinder/userfiles/files/jebadipemegufasog.pdfIn PDF document text
    • http://studiomalpocher.it/userfiles/files/57147503161.pdfIn PDF document text
    • http://rutka.pl/media/upload/files/d2f63052f588b3754adc5e71170b0473.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/gexududaka.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/27229054704.pdfIn PDF document text
    • https://pui-vital.ro/msg_media/file/bekibobukotuxinazajesexo.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/2c1d51f71c2799f808d5d911b5fd456e/98130614982.pdfIn PDF document text
    • http://aryajob.com/user_upload/file/mivubitaxipafibunovutunu.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/xedililusuvukijixorofaf.pdfIn PDF document text
    • https://drakbera.com/ckeditor/ckfinder/userfiles/files/povokuwevapuvukenutu.pdfIn PDF document text
    • http://santeh.md/img/files/66178348641.pdfIn PDF document text
    • http://labotinnghia.com/img/files/67747538006.pdfIn PDF document text
    • http://x-mobio.com/upload/files/duxifaruz.pdfIn PDF document text
    • http://foreverymuslim.net/home1/forevev3/public_html/foreverymuslim/upload/file/rupefafovafubovajinufug.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/14ff7e34f1ceeed2f201d8952e23095f/21893903912.pdfIn PDF document text
    • http://studiopetrilli.it/userfiles/files/sabezakemogubebaxebud.pdfIn PDF document text
    • https://braintreeclinics.com/app/webroot/img/files/nuzopazuwusewaf.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144ab04d2803---dujibojowomesim.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210916_096E7AE0DA916F19.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=how+to+manually+set+time+on+androidPDF 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_off0000c193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC193 16424 bytes
SHA-256: e50eafaeae76dececce32ad0ac1f5d7033ba7416d25764b0b674d3eb9aff158d
font_01_sfnt_off0000ec00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC00 10700 bytes
SHA-256: 64b1a375a4cd58fd301a01eba5d7ef4cf38ea2fd4fe5bba5dde13e91b881d1eb
font_02_sfnt_off00010494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10494 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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