Malicious PDF — malware analysis report

Static analysis result for SHA-256 f470f2ff665ab5e4…

MALICIOUS

PDF

96.2 KB Created: 2021-06-29 07:45:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 5f8d5fb9979f2e3f246bad633ca1f88b SHA-1: 5853557d31a341c2e2bf8a04fb06fa3d8fdef412 SHA-256: f470f2ff665ab5e488025ab0494b176e7d18032f7af3635af8dcfc29b17a73d5
164 Risk Score

Malware Insights

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

This PDF file exhibits malicious characteristics, including hosting a link farm on compromised WordPress sites and employing a deceptive download button lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading a secondary payload. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://wastran.ru/uplcv?utm_term=fema+is+2900+answers+quizlet PDF link annotation
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/82967ad93f4a9be6334d1ed9d0439539/pitajejitilugen.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8e302f4ed---jezogutipoderixof.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/64767013214.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/motusuz.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/puv1b0uvfr1je4oncttm5bllu0/44838330521.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/nkdt5uji4lk73bmlsumsfihakq/zavuj.pdfIn PDF document text
    • http://ordinate-ltd.com/file_media/file_image/file/59463661437.pdfIn PDF document text
    • https://electrabicycles.pl/app/webroot/uploads/file/16205864066074.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/25bfc4dcc1bdb80c9df75cf6a9c5d8d3/97116351888.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/fivepefupogogavuxawetekok.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/ec71bf4529b955283ec0c63d3d402595/zirofevewuxoxapozisalebez.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/27ee2e36d9c6d768a07a09fbfe6d93c4/kezonusubewe.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///kijiruwuwibozukixedim.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/49s07okbltiu3k5rmfg0b2dfbd/vikuveridatixijino.pdfIn PDF document text
    • http://giacongcomposite.com/upload/ck/files/robatezimimolokadokulijum.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d5079d11968---69525123809.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/14324906036.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/numutedukul.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a36966c8ed0---17370099655.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c552f7dc4db---zizoditosube.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/jusovelekesavodelamol.pdfIn PDF document text
    • https://limsurdua.com/contents//files/6338614896.pdfIn PDF document text
    • http://sunjewelsonline.com/userfiles/file/tipemijowegizima.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/35dc06906a331e0baca8bf2ea3ab3517/35188513353.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/052d744ba322b0ef6fb682b3f701a5b2/busabujasopinimilewolu.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/cr90f72bq6adtkmm1or51skube/90131350137.pdfIn PDF document text
    • http://kythuatviet.vn/uploads/userfiles/file/sufujakabaxesusunikuje.pdfIn PDF document text
    • 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_off0001119b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1119B 18456 bytes
SHA-256: bf918f7a2cb4fdfa325956e848b79399991668ab9b190a61b0f03918e1b53b05
font_01_sfnt_off000141da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141DA 10928 bytes
SHA-256: 4fad4b0090f9585e4d6fb45991663728ca16d9ec822cc5e605752742d9a253d3
font_02_sfnt_off00015b4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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