Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee7fe4acde80d63…

MALICIOUS

PDF

107.7 KB Created: 2021-07-03 01:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d1ffeac572ffca06e3c71fedbc46d590 SHA-1: 7c008d7b5ccf21b6a68d6b002e9a60140a003243 SHA-256: 4ee7fe4acde80d6376a69b0d6125b740b1ad8d7d179e0ce3c7f3c847e76511ac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of numerous URLs on disposable or compromised hosting reinforces the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.aportecnica.com/imagenes/editor/file/77533818204.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/6d836f73d3011a7b65b8ef3cc56fb780/gobakakipatoxewubo.pdf
    • https://tarzminder.com/resimler/files/2493255784.pdf
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/df1838s97qqlv2uhnm9psgptp4/biwevibonigixoxeluvujenuz.pdf
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbca0b89f3---98230955331.pdf
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/m4j2gc8f453op9l30rnfir14v5/29501493303.pdf
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/48d609292f51705228f95dcd3fe2efd4/2133832736.pdf
    • http://red-persimmons.com/upfiles/editor/files/jujugegumudekil.pdf
    • http://terminsk.by/pics/files/vetuwugefe.pdf
    • https://angkagenap.com/contents//files/86055498241.pdf
    • https://lasanisports.com/files/mafas.pdf
    • http://fly.no1-yes.com/userfiles/file/2583431163.pdf
    • http://biomassasia.net/data_ed/userfiles/file/64838296580.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/ced8e6dca8b3bffe0bbc51476cc6593d/394868428.pdf
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160a41ceda6246---6608589276.pdf
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/jijul.pdf
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/2kamrr1rjmle09e1sd0l28jm3k/38488335503.pdf
    • http://amghanoi.com/images/ckeditor/files/puzugonifigevofaliwidi.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/f5868b2d7153ae21f0b77622e9d153c3/58425903204.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/5f23cce9b7f98f214e926c9272ad7b79/12027030931.pdf
    • http://zoltysnieg.pl/pliki_wyswig/files/14869999453.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160befb191d5ed---67205532119.pdf
    • https://zivotzaokny.eu/res/file/xokowejeviniw.pdf
    • https://amoslodge10.org/ckfinder/userfiles/files/6819039661.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079009208641---tasilenirojagarizumaja.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=biggest+snake+in+amazon+forest
    • 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_off00013e46.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13E46 16792 bytes
font_01_sfnt_off00015658.bin
99803c28878094c8f7497d7d75802199a3991fdaa32030144639a91f8515a574
pdf-font-stream PDF embedded font (sfnt) at offset 0x15658 19204 bytes
font_02_sfnt_off00018741.bin
cd2f4cab4f0a79252088410bda1cfa9826b0e8409081e42a5c4846a86dfab293
pdf-font-stream PDF embedded font (sfnt) at offset 0x18741 10716 bytes