Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c6996c140a68f0…

MALICIOUS

PDF

75.4 KB Created: 2021-07-26 02:11:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6ac27296545361a362d8dcd0966f0ba0 SHA-1: 4fa57a7c3834623d0dabc10f7d74946c47206139 SHA-256: 30c6996c140a68f0d91fcda29274238146e533380f89f32f45e674fe4e37ac7c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that point to potentially compromised websites or disposable hosting, likely to lure users into downloading further malicious content or engaging in phishing activities. The presence of multiple distinct hosts and the use of UTM parameters suggest an attempt to manipulate search engine results or track user clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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://ybshajiang.com/userfiles/file/2021-07-25/2107252212560973157g6gv2m6ltwh.pdf
    • http://ttlh.vn/storage/ckfinder/files/5941377787.pdf
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/ckojhkp6eef1vls8oldbv66bn0/wizimibavekixoroxo.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/595c1cd81f9919c415578d3757387ab6/90998806766.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c92a270b603---furamuvizunej.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160776e56adaff---95323196502.pdf
    • http://biomassasia.net/data_ed/userfiles/file/28595236833.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/a1e4c27e6da39b92a163165b7d4d0a14/fesiduxedalilixu.pdf
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/16082dae17bd0a---11905353494.pdf
    • http://richardchong.com/userfiles/files/87917235550.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b9016f8b4dc---64873847739.pdf
    • http://brucemsmithlaw.com/clients/e/e2/e252bfde01ef004f685a9648d307a4b9/File/bekuwulenijusuwumasisama.pdf
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/669b896dfc619444acf333c83154cdd0/46062952799.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b8db96337---perulefowivukuwu.pdf
    • https://couvreur-hautdoubs.fr/internet_new/images_et_fichiers//file/wosifiwomowizojuvev.pdf
    • https://istanajpdua.com/contents//files/31510740655.pdf
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160861763ecd04---3177358122.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/1d05c2e32efe8e00d1a5386c940a6a63/23787564896.pdf
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/s4uclb162gg1n27o0omccv1e34/xiwajabadosawolij.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081f3119abe1---25314371764.pdf
    • http://hnkingdee.cn/Files/file/20216925948.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/d17dlt2os4336dg70uhji7a5t5/zowoxoze.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160a9277705b62---73031654790.pdf
    • http://fotofolliasanlazzaro.it/userfiles/files/82463185134.pdf
    • http://classicalgardenornaments.com/uplds/file/56780516109.pdf
    • http://51-lq.com/userfiles/file///46756082209.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=wings+of+fire+book+14+pdfread.net
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/3420c072acc515ff8033213ab66876e6/rudeseretokesojatobek.pdf
    • 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_off0000c516.bin
c9beb77789ed84f1317fa7dffd2a044c58b49baebc44d4f40879f1f102dc211f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC516 15648 bytes
font_01_sfnt_off0000ed50.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED50 16792 bytes
font_02_sfnt_off00010567.bin
955ce12a8a47d3cedfd99f5abc8efd9f5fc4fd8718330d8a4e6c24c00696aba1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10567 11048 bytes

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