Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e97055eb6cb715…

MALICIOUS

PDF

68.6 KB Created: 2021-10-01 05:04:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b427c41bbf3d090bc42814c21903c630 SHA-1: 880eede9463bc835e972845db611b927048f0301 SHA-256: 80e97055eb6cb715fb4fea59b0b1d4d1165fe79b7babfc9082ce2c316eb7afc4
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL analysis and heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://boonfagrandhome.com/user_img/files/fuzurixujivo.pdf In PDF document text
    • http://jeykrishnaclub.com/images/file/lukekiwoxawivob.pdfIn PDF document text
    • https://signika.pl/Upload/file/fasebufufupabapen.pdfIn PDF document text
    • http://shijijiaming.cn/filespath/files/20210902133342.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc5f5e8915---negezewo.pdfIn PDF document text
    • http://infinity8talents.com/userfiles/file/61008172836.pdfIn PDF document text
    • https://micro-logic.ro/images/uploaded/file/35165921826.pdfIn PDF document text
    • http://zjhywt.com/images/upload/File/mirafalibesaradi.pdfIn PDF document text
    • https://pakistanchristiancongress.pakistanchristianpost.com/userfiles/file/82021311356.pdfIn PDF document text
    • http://antichigelsi.it/userfiles/files/mototavuwe.pdfIn PDF document text
    • https://syteq-pro.com/userfiles/file/16794418644.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/5a5accaf0775f6a4c09d986517060f31/32395275204.pdfIn PDF document text
    • http://polishingmarblefloor.it/userfiles/files/40238279670.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1614b1a816038a---16154677709.pdfIn PDF document text
    • https://www.sudicobank.com/ckfinder/userfiles/files/vodadipeluv.pdfIn PDF document text
    • https://moiatakashta.com/userfiles/file/wezeximipuse.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/55966923932.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/30180328611.pdfIn PDF document text
    • http://banglenhospital.com/UserFiles/File/lusuvamewenowo.pdfIn PDF document text
    • https://rcot.org/userfiles/file/17661497178.pdfIn PDF document text
    • http://petra-koparki.pl/Upload/file/bazejoji.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/8a69bb4bebd96706515ac230ad756018/pokukijatugi.pdfIn PDF document text
    • http://penzion-u-zamku.cz/files/file/99395973192.pdfIn PDF document text
    • https://ghnservizi.com/file/41315936984.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=smackdown+vs+raw+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_off0000ae68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC67A 14664 bytes
SHA-256: a94f5f010c11b686b09899df899a5d6ecd0e632c9f5e8497e72d54a5ea21d48b
font_02_sfnt_off0000eb76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB76 10624 bytes
SHA-256: 969deea228da638a0308f59d09366cfea8447ffb0116f57a7d117aff3e303f9d

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