Malicious PDF — malware analysis report

Static analysis result for SHA-256 3df17a48adc7d916…

MALICIOUS

PDF

69.7 KB Created: 2021-09-30 12:54:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 565e000199379f3ab08dd7e24f668f19 SHA-1: 023fdb6778c00359c81cfef0fb5d008fb651924e SHA-256: 3df17a48adc7d916b0be5044f6cddbf73c6c1fd26c88e333eaa9630f8d5bb1c6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of a URL with 'pok

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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 https://ketchas.ru/uplcv?utm_term=pok%C3%A9mon+unite+game+download+apk PDF link annotation
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1613769a279492---25439762551.pdfIn PDF document text
    • http://otpetye.com/images/shared/file/49652508773.pdfIn PDF document text
    • http://daeryuhealthcare.com/ckupload/files/29854947537.pdfIn PDF document text
    • http://www.mmd.ntou.edu.tw/ckfinder/userfiles/files/nobonagute.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/foxexoremukerelofa.pdfIn PDF document text
    • http://hanyangsteel.com/files/fckeditor/file/230768942614a02eba81d1.pdfIn PDF document text
    • https://inprovitbolivia.com/ckfinder/userfiles/files/93157464846.pdfIn PDF document text
    • http://geopraxis.it/userfiles/files/fupolusatefalupuxase.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/45141887605.pdfIn PDF document text
    • http://dobosugyvedkecskemet.hu/userfiles/file/solukivajakotekalokame.pdfIn PDF document text
    • http://swaptoys.org/ckeditor/uploads/files/22143956259.pdfIn PDF document text
    • https://hahapediatric.com/uploads/files/202109161754409834.pdfIn PDF document text
    • https://naucharts.com/ckfinder/userfiles/files/zobenasovudegajubuzov.pdfIn PDF document text
    • https://gabconstruction.com/ckfinder/userfiles/files/fesobutoxunebigu.pdfIn PDF document text
    • http://videocycling.info/files/file/maveketubebejigumosiwaj.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/jatibugetobonivuxagu.pdfIn PDF document text
    • https://ln80.cn/filespath/files/20210925100953.pdfIn PDF document text
    • http://scbczy.cn/up_files/file/20210904_091725.pdfIn PDF document text
    • https://careersourcechipola.com/files/public/lalokagixorifimed.pdfIn PDF document text
    • http://zhuoxinlaw.com/userfiles/file/20210914114840_480882229.pdfIn PDF document text
    • https://drosamahetta.com/userfiles/file/vefilivopo.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161464fc3993a5---94715431901.pdfIn PDF document text
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/majuwakalufopab.pdfIn PDF document text
    • https://mediaget.ru/userfiles/files/kubis.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/8d42396fe32e00d1df210f05b2fafd35/43971896764.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_off0000b035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB035 15036 bytes
SHA-256: 77f379605e7b8bbf5ecc8e6182f2b6c3880a985bb48fe84b09b1e919f40cd0ca
font_01_sfnt_off0000d61c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61C 10900 bytes
SHA-256: 10832e7f0954674a633ac9c7a8206c4b5f4a93d77ecc466678736c7a6a8073ed
font_02_sfnt_off0000eedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1