Malicious PDF — malware analysis report

Static analysis result for SHA-256 49e7070ba58cc2a6…

MALICIOUS

PDF

82.1 KB Created: 2021-04-14 18:51:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: eb2d9b2984911f1bb12a12b66acac6f5 SHA-1: ed1ebaf527444f094cda64335aa2b25547b2e549 SHA-256: 49e7070ba58cc2a6492e19cd7924c53c43908610cd4d82f961c6c35fbcfceaf2
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs to a phishing-related page, as indicated by the 'utm_term' parameter. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests a malicious intent by identifying the PDF as a link farm hosted on disposable infrastructure. ClamAV detection confirms this as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=how+to+write+a+voided+check+for+automatic+payments PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4388178/normal_5fec84f06bb9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463526/normal_6050dd5e11bf2.pdfIn PDF document text
    • http://larumutul.getenjoyment.net/roleponenepatomibiko.pdfIn PDF document text
    • https://jifofavara.weebly.com/uploads/1/3/4/6/134631997/f58d580b647e408.pdfIn PDF document text
    • http://pawomodom.medianewsonline.com/abrsm_grade_5_theory_workbook.pdfIn PDF document text
    • https://zekedijudanafow.weebly.com/uploads/1/3/0/8/130874467/2960875.pdfIn PDF document text
    • http://melowew.scienceontheweb.net/11561128445.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471273/normal_603765ecddde1.pdfIn PDF document text
    • http://ludexeliviw.22web.org/spanning_tree_protocol_espaol.pdfIn PDF document text
    • http://zovitidagawas.sportsontheweb.net/1713251233.pdfIn PDF document text
    • https://mapilezije.weebly.com/uploads/1/3/5/3/135322213/nitafateruku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dubobosijube.rf.gd/lekerutulabubefixepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c98934e-3b12-42af-9a07-958c5901579e/singer_6212c_bobbin_size.pdfIn PDF document text
    • https://c63ca81c-6df4-4ec3-bc2e-8508f29a6879.filesusr.com/ugd/d48fe3_dd8fe205b7784507b5ff147ac1d16dc8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/64f2a176-429c-4e40-86f6-9505ce5ab6cf/86524277999.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3f0f9dc-a0b0-4837-8c27-41c40551283c/how_can_i_make_100_million.pdfIn PDF document text
    • https://37bcb4aa-7747-4ff6-a352-0e22bf983c21.filesusr.com/ugd/4393d3_74513a65f7974ab09df712116d6e7f86.pdf?index=trueIn PDF document text
    • https://07f52280-50dc-49c2-beec-a2e30bf849d0.filesusr.com/ugd/7b8f90_0e1e626b4005485f9c52e300a6bea97d.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100EA 5640 bytes
SHA-256: f6415fb3b2e3b8863ca47cf123bae2a6c58b306b433fd1ffbe904bd977a38918
font_01_sfnt_off00011411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11411 11568 bytes
SHA-256: 0f4b046adb22614bbfe9f6d696b5f8bb0ef0dce4b27dcaf4d5e955d71917453c

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