Malicious PDF — malware analysis report

Static analysis result for SHA-256 485e7935ac6f61aa…

MALICIOUS

PDF

82.2 KB Created: 2021-06-09 06:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 40dc5f81daacf4986ebd862816719edb SHA-1: 0a87b9770a8009989e02211f6029dff32509eb5b SHA-256: 485e7935ac6f61aaeff2cd1c67dc19e1d3abf2ddab790d6e9353a5552f158f5c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS upload directories. The presence of 'utm_term' parameters in some URLs suggests a phishing or SEO manipulation tactic. The file's structure and the nature of the embedded links point towards an attempt to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pixomot.ru/uplcv?utm_term=hua+hua+you+long+manga PDF link annotation
    • http://www.aadhar-interior.com/userfiles/file/64092094465.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160815fb0571e1---jukulajudita.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/29c4bac20656a9a3bc16f2131bbfffdf/wewenuba.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/2a3f817b86042644120c060fbc6c8a72/tuketuwalavititezifojux.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/619u00t5un5eq58e6bbf4m7s36/lidukagokoropokepegetabuk.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/3040phmpl97sf6l82n7t3apfj4/74812172150.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16078be662d1b1---33595867421.pdfIn PDF document text
    • http://jngf.cn/files/file/lijutuko.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/teketirotanedojakofadivub.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/vemozim.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/47278876820.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/dec727d64c10a6ce7c6f89dcab30412d/87977124710.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089964345e2e---piropakax.pdfIn PDF document text
    • http://baraanduliaptti.org/userfiles/file/guximajedobimixidofax.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/xiwajiduduw.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a990693fbe9---ledazuwofatibiborowu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e67b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67B 3948 bytes
SHA-256: dc5d898a076feff1b038fb30b959be993dc1e6ae56bf35a7053942df525d80ae
font_01_sfnt_off0000f45a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45A 4524 bytes
SHA-256: aaea50be3c6cdedde5a809a066962d0639e8dae0392dd6e1e04a11cb4b4e8128
font_02_sfnt_off00010387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10387 14420 bytes
SHA-256: 4a4e788866c08055924125f2eb92ae2d824a370650c03b5f50e7571bacbbd296
font_03_sfnt_off00012d33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D33 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

Open this report in the interactive analyzer, or submit your own file for analysis.