Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee46a28d33d5071b…

MALICIOUS

PDF

81.5 KB Created: 2021-03-20 17:43:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d72d666691778e2c6c45d41098e0c851 SHA-1: 2c6ad992a2acad828bb669b6679b965e019c8265 SHA-256: ee46a28d33d5071b32ee85edcab0eb514b58d16a02c8c5f7dab5df6567c7bfbd
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a large number of external links, indicating it functions as a link farm. One prominent URL, 'https://ponafet.ru/strik?utm_term=polo+ralph+lauren+employee+discount+code', suggests a phishing or scam attempt related to discount codes. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ponafet.ru/strik?utm_term=polo+ralph+lauren+employee+discount+code PDF link annotation
    • https://cdn.sqhk.co/novujarogoga/bNfRsgd/memoji_stickers_in_whatsapp_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/nikofejujel/hhgjgib/free_business_checkbook_register_template.pdfIn PDF document text
    • https://cdn.sqhk.co/vodadavubex/e6MjfeY/clock_face_template_png.pdfIn PDF document text
    • https://cdn.sqhk.co/gefisodir/fgfZHw9/tuvuzelixerebevuko.pdfIn PDF document text
    • https://cdn.sqhk.co/wikepijosipi/jMRj6kS/argentina_10_brazil_1_video.pdfIn PDF document text
    • https://mivagefe.weebly.com/uploads/1/3/1/4/131453450/wuxipidew_tusinatim.pdfIn PDF document text
    • http://xusonawifofi.iblogger.org/48750368465.pdfIn PDF document text
    • https://cdn.sqhk.co/sirijunubi/lWhhbFl/drop_smash_mod_apk_android_1.pdfIn PDF document text
    • https://madapupe.weebly.com/uploads/1/3/4/6/134667506/3063167.pdfIn PDF document text
    • https://zamovolipizutuj.weebly.com/uploads/1/3/1/0/131070940/3645920.pdfIn PDF document text
    • https://cdn.sqhk.co/wevafofed/NhbnMKy/lipereri.pdfIn PDF document text
    • https://cdn.sqhk.co/zanudiwageg/eWgi4jf/rectangular_prism_faces_edges_vertices.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
    • https://fa90eb46-aa9b-4fd1-a2e8-e903ec8e50a4.filesusr.com/ugd/575fb0_63dadad6030346c3b8b7bed52b5aaeef.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/fidonenutujizuvevo.pdfIn PDF document text
    • https://e3c65705-3664-417e-97b1-2ac29bfab8bd.filesusr.com/ugd/6a5da5_278b923efc504315bea7104ad128715e.pdf?index=trueIn PDF document text
    • https://44034db3-6cdd-4729-adf3-7ccd6afcf354.filesusr.com/ugd/9fe9cc_caf25a8e351b42679f953aecae012fb1.pdf?index=trueIn PDF document text
    • http://fofovukejubewa.epizy.com/83048950780.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/54172321069.pdfIn PDF document text
    • https://9e269ae7-c3cf-4b9f-bde2-1d9be064b7bf.filesusr.com/ugd/139869_e3a8e1aeb4b346b6bb9683adedab8421.pdf?index=trueIn PDF document text
    • http://gawusozuf.epizy.com/how_to_draw_anthro_heads.pdfIn PDF document text
    • http://fasemejatafa.rf.gd/autocad_3d_notes_in_urdu.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE6 5296 bytes
SHA-256: 66799a7ccf57715adfb5856a17ff54fcd413865ffa0b56e7ea5b8fe7a327d9bf
font_01_sfnt_off000100b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B9 12024 bytes
SHA-256: 7dc37e4cf375f02e24e0ac140ca8952dce04942d0642a8dfcd165996e7778bec
font_02_sfnt_off000129b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B1 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c