Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1c5e40f0339fab9…

MALICIOUS

PDF

76.2 KB Created: 2021-07-01 21:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2cc21e9e1d45f08b41d8f49a23855a08 SHA-1: f9d1210dafde836e569009d57647c9254171ed17 SHA-256: e1c5e40f0339fab977fde2e406467038060dd42db81cbd69e9d91fd7aa61a1da
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. The document contains a link farm pointing to multiple compromised WordPress sites, likely intended to host or distribute the actual malware. The presence of external URIs and a 'download button' heuristic further supports a phishing or social engineering attack pattern designed to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f229eb5d10---talapekidiz.pdf
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/83747245972e50dd8c96fedbbc6ec87d/63921848632.pdf
    • http://thomasbelldescendants.com/clients/40432/File/morezofuroxasafapebutimul.pdf
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/ec01a1f0966c854346874e0d035636c5/zujaxedogore.pdf
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/0s9dlmsrprg2gak4vhigrg97i5/fanag.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/29855cfefb498bb90ea8006146f847e9/jexugewidaxeze.pdf
    • http://augustaelectricalwork.com/editorData/file/punebi.pdf
    • http://fulepmark.hu/nyebu/fulepmark/userfiles/file/luvozoxo.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/f9a63518470800fdd0b189da2850892a/40203607758.pdf
    • http://spearsyounglegacy.com/clients/b/b2/b2c23f164518415ec8f3c1c8d0af542d/File/fogelubemevaleti.pdf
    • http://gymostrov.org/gymostrov/userfiles/file/najetemitebod.pdf
    • http://theettiaresmontreal.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/65176339613.pdf
    • http://tuzlakart.com/files/xuxaxava.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc1841c2a0---radisovasomosexejexajuzo.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/607756d3d4f73a9b8a892a5b9502f874/ruzofewitetozom.pdf
    • https://0900107678.com/upload/file/8101117088.pdf
    • http://belhavenhighschoolalumni.com/clients/13962/File/sofibifak.pdf
    • http://apexibd.com/uploads/fck_uploads/file/torikagupobebu.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/c350e767b9eb904978737d38771fefec/12012606568.pdf
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/8a9f0f19e42026df8c96b8ef8663d1a4/tipukejupofivijuwojekeka.pdf
    • http://parvazyab.net/basefile/api203/files/pudororezegerurabakukep.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/cb4f9033079b8aa285834f414f47f1b3/gaxofotadotisawopujer.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/1fb4e03a41b49f23a0b4494ecc058247/wusovivagopapejiliwun.pdf
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5b794f665---rufanilalup.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5cf401df2---73254884513.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a983dd8b722---mimiwefewulez.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=pdf+autocad+converter+free+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7fc.bin
8351f612e7b39887a627912763c8c585412772117c41f86e4a02680c8ddd89ab
pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FC 10464 bytes
font_01_sfnt_off0000dff7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF7 16792 bytes
font_02_sfnt_off0000f809.bin
9e73f35fa32708fda8fd37fab2f31cd011197277214c0d5d9bd56596975a0576
pdf-font-stream PDF embedded font (sfnt) at offset 0xF809 16156 bytes