Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d35184da0b20d11…

MALICIOUS

PDF

90.8 KB Created: 2021-08-01 08:13:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9a64bf609841ecf1836f9b9571376ac3 SHA-1: b2d3fee9a78ddb10da916b9a102dddc62a90d8df SHA-256: 0d35184da0b20d11b985027cf337586f16a2fe7169bf99167d00aa86f5bfb636
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. Numerous heuristics point to the PDF acting as a link farm, directing users to various external URLs, some hosted on compromised CMS uploads. The presence of a 'download button' lure further supports a phishing or malware distribution attack pattern. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://irlanc.ru/uplcv?utm_term=the+human+centipede+2+download+full+movie+free PDF link annotation
    • http://symbioticlifetech.org/attfile/fckimg/file///20210714114145_846681777.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/nelelawasekozefejolokomo.pdfIn PDF document text
    • http://www.vnos.vn/app/webroot/uploads/files/34770243677.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085576731496---wesixazawazasalogu.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c22e8fe90---85896806933.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/b48587f5c91dcbcb14ef3e99a3d79628/24074104147.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/gejowoxetatifimota.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/c6s923fj77eopu32bb1kosb9fc/90302339661.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/16054719276.pdfIn PDF document text
    • http://cmuniontravel.com/userfiles/file/wakodofidudisitajubam.pdfIn PDF document text
    • http://phuvuongcorp.com/luutru/files/719617712.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/nm201tglif4tq2p1803h2jc95n/pesapon.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/1c2e7c3773702eeb4bcb1d5f0a5fe6d4/butatopokitex.pdfIn PDF document text
    • http://eventologia.com/userfiles/files/nigukitelivukimeruko.pdfIn PDF document text
    • http://risme.vn/files/32380181173.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/9081400846403cc35a48279bcc959430/tilewudaduzovizob.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160c863f75ce69---rekubivafililumafokib.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/90f3842ff27858643e8bb19ea3a5a4e5/74494029497.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/nizule.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/podivevexemenewesovoso.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607800d80b56f---79511589882.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/48504934472.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/ca6e0ceb28fb12dcd8e00b89925a8056/kalodokix.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/74389590172.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_off0000fe52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11664 16896 bytes
SHA-256: 05ff6228bd0f2985eec3c29d0a181f1a5cf76bbb1c6ecbb40285149392058bfe
font_02_sfnt_off0001425e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1425E 11052 bytes
SHA-256: 99a6b77278e6178281e329d2ebf2cb35830d692d26cc2075562eb647f23027bb

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