Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffcac7553e6b7399…

MALICIOUS

PDF

79.6 KB Created: 2021-09-02 02:12:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 62416c8cb6ec4f53d38c783d91d796f6 SHA-1: 608edbc553d5019023827174270b0f0e1211db39 SHA-256: ffcac7553e6b7399504372f7c588a70b99ee7855c195b78093d7324cdf7b00a3
164 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites and other disposable hosting, indicating a link farm designed to host or redirect to malicious content. The presence of a "download button" heuristic and ClamAV detection as "Pdf.Phishing.Trojan" strongly suggests a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and heuristics point towards a malicious document intended to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://dotcomtravelegypt.com/userfiles/files/38790865939.pdf In PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/fagope.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/40cvii5042hmoq0hpc1iikraan/99805111712.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/gowebelenixifizavofuge.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/49912799424.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872fad38eb7---96387051792.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ca2a397416b622cc8912316145f4f164/rolinurij.pdfIn PDF document text
    • http://www.cda.org.hk/ckfinder/userfiles/files/92491870001.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/2d9d2a5ef7db0e68c095c4fb5125078e/10781041004.pdfIn PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/pijosujegaxeguz.pdfIn PDF document text
    • http://kiapelhrimov.cz/UserFiles/File/41445673972.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/41593593765.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acb3c08c7a1---dilomopejiz.pdfIn PDF document text
    • https://copab.tn/216mag.svn/uploads/files/35627388442.pdfIn PDF document text
    • http://93564497.com/userfiles/87216789931.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/1e4f38d0f4c8b4c5fe119a07702e7743/73967216141.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/fibinerozunefoz.pdfIn PDF document text
    • http://sentralperdana.com/file/23232536413.pdfIn PDF document text
    • https://aymsoft.us/aym_image/files/43849907269.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16121868b2d9e3---gezusefemu.pdfIn PDF document text
    • http://alwaysfavorentertainment.com/clients/879371/File/38384724980.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=apple+ringtone+download+pagalworld+mp3PDF 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_off0000d325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD325 10804 bytes
SHA-256: 010b654d7ea120f86082cac8a7ccbca8f2871e9b0e677d3a90c4420fe2fc52ed
font_01_sfnt_off0000ebe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000103f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F5 17060 bytes
SHA-256: 23e234585d2ec15b5c564b5729036d85c537bace2c8b2e8556c919aa7578df30

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