Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0a0eb0b0d50dab2…

MALICIOUS

PDF

72.4 KB Created: 2021-09-23 12:55:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 151b32b0ae738f3c52b699a063606d9c SHA-1: 430b13f554f4344449918e67127a22911a226050 SHA-256: a0a0eb0b0d50dab233f19cf9c182ad75f137676d81cbed7bf1f7248db88450c1
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites, suggesting an attempt to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of numerous unknown URLs associated with compromised CMS uploads reinforces the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/bawax.pdf In PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131f87e72a1b---xirutugibeku.pdfIn PDF document text
    • http://maraulsan.com/ckfinder/userfiles/files/rujaxumukekesaxi.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148fb06c9891---gusagogenuwatogubube.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161408f3f1df39---jidinu.pdfIn PDF document text
    • http://urgentcarepb.com/userfiles/file/bebubu.pdfIn PDF document text
    • http://madinagirls.com/easydo%20v2.00/files/uploads/pisizodixojasusevufugibej.pdfIn PDF document text
    • http://bloodfaces.de/attachment/file/jafarapibapuzoninonexa.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614064764b8d3---zakevukujawusutabegero.pdfIn PDF document text
    • https://deltarents.com/upload/ckfinder/files/95100471020.pdfIn PDF document text
    • http://rewitex.pl/userfiles/file/71022837689.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab58d81fab---95524022566.pdfIn PDF document text
    • https://yesilkoyluleriz.biz/resimler/files/bumajovumokekatopevozi.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/86308199889.pdfIn PDF document text
    • http://partnercable.hu/files/12518396397.pdfIn PDF document text
    • http://candleelectricals.com/uploaded_files/userfiles/files/tibav.pdfIn PDF document text
    • https://osakaav.com/userfiles/files/8311534755.pdfIn PDF document text
    • https://surupaceanu.ro/ckfinder/userfiles/files/pifesofuxoba.pdfIn PDF document text
    • http://budka39.ru/files/19507152374.pdfIn PDF document text
    • https://hoatuoi360.vn/uploads/files/vimitir.pdfIn PDF document text
    • http://brno-skoleniridicu.cz/ckfinder/userfiles/files/67086545476.pdfIn PDF document text
    • http://scro.ru/pic/file/14452268007.pdfIn PDF document text
    • https://anctools.com/ckfinder/userfiles/files/18067410662.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=read+dork+diaries+online+free+pdfPDF 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_off0000b935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB935 16512 bytes
SHA-256: 449811e40bf3d97b0269023ab1f346fe880b3bc92d3221fc55d07e5e5deddb3e
font_01_sfnt_off0000e3cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CC 10528 bytes
SHA-256: 8a895e16b6886ebd5f26b0b0d47fb4dbda88a01ecfd4a380d10330d30e4e7e52
font_02_sfnt_off0000fbd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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