Malicious PDF — malware analysis report

Static analysis result for SHA-256 200a43f14267816e…

MALICIOUS

PDF

93.0 KB Created: 2021-07-31 08:27:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 78c5f3825bbb9f8a73b17bc4420e0c30 SHA-1: b6c088d9bfda10444270b5dd2491edb15c40fe89 SHA-256: 200a43f14267816e89ff9e1f1718bda238fc458f8304c44bc9a87cdd34b9a305
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, indicative of a link farm used for SEO poisoning or phishing. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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 https://drafthe.ru/uplcv?utm_term=paraclisul+maicii+domnului+marian+moise+mp3+download PDF link annotation
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/vdn7uktiutlh0qiao0ubte6odu/53455761751.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/2d9da218defeda1191b249ed7875b839/83802137887.pdfIn PDF document text
    • https://www.koreayokogawa.com/ckfinder/userfiles/files/49103939618.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/66325163378.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/f6c4c117de7d91798088e725f67f96f6/43046149717.pdfIn PDF document text
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/20141042424.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c64ee043f90---40847900237.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/5dih8mjjos3slk55achiu3drr5/79935052811.pdfIn PDF document text
    • http://gardnersunited.com/clients/e/eb/eb3320446930dd457027df34457c622b/File/kilepunelidix.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/30njph5e908v8gmsip8915pre1/zowoxofapolosofejigi.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/kidufuwukibuj.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/e72080d53522174d372775c4c0d50093/tegakidonerasu.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/20341402699.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd07c0743a---fotivovejeve.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160853cae86777---99410393101.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/2079d8d01524fe78c33da8b6f839d8f7/tolikipagobigupinosu.pdfIn PDF document text
    • https://radiosmile.hu/upload/file/75746061036.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/2abf72ead6eca010fd508a5707c0e572/peworudewojakizilude.pdfIn PDF document text
    • http://nikacarpet.com/My_Project/Hamishe_bahar/ahar_img/files/1338198597.pdfIn PDF document text
    • http://brno-skoleniridicu.cz/ckfinder/userfiles/files/59881483556.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/53628195825.pdfIn PDF document text
    • https://vivekanandbawwa.com/userfiles/file/bekematofamixe.pdfIn PDF document text
    • https://trouver-une-ssii.com/img/pics/files/sivabilog.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_off0000f9c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C8 23252 bytes
SHA-256: 1d29d3bc140975fb3101fd9c90b79e7d49d51ab56c43da1245cfb1ef70502de3
font_01_sfnt_off0001332b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1332B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014b42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B42 10936 bytes
SHA-256: 09fe54fa0925a933ddde0cd059db68f4755a622cca6e5a57b414ed417644abfc

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